I give up. You guys are hopeless. You want something that looks factory, yet isn't. Happy hunting. :{
The wiring is 3rd Grade at best. If you can't figure it out, quit your whining and let the pros handle it (the dealer :-laf :-laf ). Otherwise quitherbichen and get on with life,

You ani't-a-gonna ruin yer truck with a few 3M gel-filled connectors, just try it, they DO WORK.
Sorry to be so blunt, but it's not a complex problem. If you want
FACTORY look, you HAVE TO GO WITH FACTORY PARTS ON THIS ONE!!!!!!
I forgot to mention this earlier but the trailer lightbar only requires one small hole for the wires to be run through. No "template" or anything else to worry about. Just measure or "eyeball" to find center and "away you go"...