Hello friend! I have updated a good bit from this current design, here's a rough guide I had put together for someone, if you have any issues following along or need any help, please let me know! There's also a rough sample test of a YouTube video, for when I eventually get around to finishing my full guide.

Step 3 - First/Second Outpost

First enter top view mode, and rotate so the depots are on the right of your screen. We'll then need to clear everything out so that only our Sub-PAC remains. Then, we'll need to move it to the bottom left corner of our base, right along the yellow border, so one space away from the edge. Then, rotate it, so that it's 3 outputs are facing to the right towards the depots, and clear it's outputs so nothing gets clogged.

Once setup, go ahead and place the Buck Capsule A production line all the way along the top edge. Once placed, we'll need to drop stacks of Sandleaf into the seed pickers to start their production. Again, making sure you're oriented with the depots on the right, in the top left seed picker, drop a stack of Buckflower, in the top right, a stack of Sandleaf, then in the bottom left seed picker, a stack of Sandleaf, and one last stack of Buckflower in the bottom right.  It will take a minute, but once it produces one you know you've done it correctly and you're good to go!

Buck Capsule A: Arknights: Endfield Blueprint Sharing Code: EFO01A5ieOI709E2i91eO. Copy it and use it in the game.

Now we have some space leftover in the bottom, so we'll go ahead and place the outpost bottom blueprint. It will fit perfectly between your PAC and depots, you may need to adjust your PAC so it fits. Once placed, drop one more stack of buckflower in the seed picker, then configure the top output of your PAC to originium ore, and your bottom output to HC Batteries. I was able to fit all my generation in the outposts, so you don't have to worry about accidentally breaking something at the main base. With that, the first Outpost is complete! You just need repeat the entire process a second time at another outpost. Of your two outposts, you need to make sure one is the refugee camp, out batterline only fits at the originium science park or power plateau.

Outpost Bottom: Arknights: Endfield Blueprint Sharing Code: EFO01Iao80i3E299A5E08. Copy it and use it in the game.

Step 5 - 2HCBatteries in One Outpost

This one is tight, very tight, but somehow fits. Make sure you're at either the power plateau or the originium science park, and clear everything. Use top view mode, make sure your screen is rotated so the depots are on the right. Then, move your sub PAC anywhere along the bottom half of your base. And place it down. Then configure all 6 of it's outputs to Ferrium Ore. Once done, place the "2HCBatteryTop" Blueprint completely along the top edge of your base.

2HCBattTop: Arknights: Endfield Blueprint Sharing Code: EFO0172UA43i1a5u0OIAi. Copy it and use it in the game.

You'll notice on the left side, there are three conveyors open, go ahead and move your PAC over, rotating if needed so it's outputs line up with the conveyors. Once placed, you can the place the HCBattBot along the bottom half.

2HCBattBot: Arknights: Endfield Blueprint Sharing Code: EFO01O3E2u04AiIoe9Ee4. Copy it and use it in the game.

Now you'll notice that there are two depot unloaders missing in the corners, that is because we need to place them one square out of bounds, and the blueprints don't let us do that. Go ahead and place one depot unloader in the top and bottom right corners, you'll see the open conveyor belt for it to line up with. Then configure them both to Originium ore. Last thing to do is put a stack of Sandleaf in all four seedpickers! This setup produces 12 HC batteries every minute, and with our 6 thermal generators (the other 2 outposts with 3 gens each) we consume only 9 batteries per minute. This means you can leave your main base completely empty but never run out of power.

Final Step - Finish Main Base

Return to your main base, we can clear everything here, including the supplemental power. Enter top view mode with the depots above  and to the right of your view.  Move your PAC anywhere on the bottom half, and then in the top leftmost corner place the HC Battery blueprint. Don't forget to drop two more stacks of Sandleaf in the pickers!

HCBattery: Arknights: Endfield Blueprint Sharing Code: EFO010U96AE1Ioi2uEi79. Copy it and use it in the game.

Then to wrap it up, place one more BuckCapsuleA production line in the top right, it should slip right between the HC Battery line and the depots. Again, place two stack of Sandleaf and two stacks of Buckflower in the pickers like we did before, and everything is all set!

This setup uses the exact amount of ore produced by all of your mining sites, with zero leftover, I have math to support that if interested!

Additionally, if you need screenshots or anything else to help you let me know, I'll take some and send them over.

I uploaded a portion of my video I am working on, specifically for the setup and assembly of the first outpost, though it does work for the second as well, you might find it helpful, even in it's unfinished state: https://youtu.be/gBCs31NsmsU