I got all the stuff for a nice 7 pin trailer set up with incorporated flat four, and then struggled a little bit with how/where I was gonna mount it. Threw some turds on the wall to see which one stuck good, and went with that one. Most betterest to tie into the bed part of the taillight circuits and have only one connection point to the chassis with one to one connections. All the splitting will happen in the bed back with a busbar sealed up really good under the face plate. It was tempting to flush mount into the hitch, but that isn't a good idea...would have looked super clean though. It still will for the most part though.