I routed my cable along the bottom of the right hand rail and up through the right propane bay.
The camera connector can be disassembled making it much smaller and easier to deal with by first cutting off the rubber cover over the coax connector then unscrewing the connector with a couple pair of good pliers. The connector has Lock-Tight in the threads so it does not want to easily unscrew therefore some gentle persuasion is required by gently tapping on the connector with a couple of hammers. I want to emphasis gentle because you don't want to crush the connector and repair it (I had to repair mine after pulling it apart during a distracted-by-brother-in-law disconnect incident but that is another story).
I drilled a hole into the front bay behind the propane bottle and routed all the excess cable into the bay. I built a cover out of aluminum to cover the transition hole in the side wall. Next the cable was routed behind the jack and up to the nose of the trailer. I attached the coax connector to a fiberglass fish tape and worked it through the fiberglass insulation to the pin box. Working the cable to the pin box requires patience but it can be done. I tied the cable to the trailer connector using a flexible sleeve I bought on Amazon, and the camera cable is 3 or 4 inches longer than the trailer cable. You will have excess cable, so roll it up and ziptie it behind the front jack.
You can call me at 214-914-3771 if you would like more boring details.