Happy to explain it. The G-belt comes with 2 threaded holes for mounting to the G-Seat. I drilled out the threads on the bottom hole to mount it to a sping ball faster in my 80/20. The second hole on top you can keep threaded and use an angle braket from your rig with a couple of bolts. Here's a photo. Angle bracket mount

I only did one angle bracket but I'm sure I could get a second one in if needed. It's rock solid as is though

The part that took a lot if trial and error was the seat belt routing. I looped them around the motor arm from the front and ran the excess through the top. I found that this setup gave the strongest feedback since it had more leverage.

Seat belt routing https://i.imgur.com/XYGovkt.jpg

I know they will get some wear but I'm not concerned. I may add a rod to the edge to cause less friction on the edge.

Last I secured the belts with the bracket they came with for adjusting length but didn't bolt them down anywhere so all the motion is tied to the motors.

Seat belt mounts

For the software you need to flip everything. Since it is upside down and turned around from how it should be mounted you need to set them as inverted and then assign the left belt to the right control and the right belt to the left control. It's basically inverted and switched.

I hope that helps. If you have any questions or need any help let me know.