We carry a tandem bicycle on the back of our trailer and would like to use a cover but that would completely obscure the taillights. Can I run a long four pin cable from my truck under the trailer (using four pin and seven pin simultaneously) to a removable light bar? That’s the simplest approach. Alternatively, I could tap into the taillight wiring but I don’t think I could mount the lights high enough without getting under the insulation (which I don’t want to do).