Im looking for a beefy one that has supports which go on the frame rails. So I think that its a "Class III"?

Just needs to be functional. Probably pretty heavy but I betcha it might fit in one of the various flat rate priority mail boxes, maybe the long "game board" one

Im not sure what the wiring situation is. I think it should come with some kind of connector right? Or is that something else?

Shipping to 92544

I can pay with paypal or ?