I've turned my attention to lighting now. Here are some pics as of this evening. There is good news and there is bad news.
The good news is that the trailer wiring is all correct. I used a junction box with terminal posts, and I decided to go with a 7-pin connector to allow for future possibilities. Much of the wiring is run through 1/2" conduit. The box is mounted on the underside of the front edge of the cargo rack, with hopes that it'll give me easy maintenance access. The Darkside and I rigged up temporary mounts for the LED lights.
The bad news is that the TJ's trailer wiring is bad. Once the trailer was wired, we hooked it up to the Jeep and got NOTHING. I rigged up some jumper wires and used my car's battery for power. Voila! The trailer lights worked great, but the TJ now needs attention.
The pictures.....