Seat control box (drivers side) fell out & is hanging from wires. How to fix???

Hello, Inspection is key here, as you will need to identify where the switch connects to the seat, and ensure that all of the retaining clips are still on the switch housing. If they are there, pop it in, if not, you will need to replace or fabricate. They are probably not expensive, and you can certainly handle the repair with nearly no skill.