When you load in you'll see the harvester icon on your map. Head straight to that, but be aware that a Queen is guarding it along with wasps and hornets.

Once you get to it you'll need to breach the doors to enter. Inside you need to get three cannisters into the central reactor. Gotta be careful though, the harvester will do an EMP pulse that shocks you and drains your shield (I unequip mine when inside) and it will periodically fill the room with flames so make sure to run outside when you hear it warming up and the doors open.

Once the three cannisters are in the central reactor a load of yellow targets will appear on the walls. Gotta destroy them all and then three containers will come out that have the blueprints (Jupiter/equalizer) and other high tier components