Thanks, Jonahs. You
did send the light bar install instructions and that'll be my guide for the interior wire run.
The lights come with some wiring components but I'm not sure which ones since the boxes are still sealed. I do know a full harness is not included so for that I'll model Phil's design found
here.
As for the weather resistant wiring, good tip and thanks. Underground rated Romex okay?
Still need to organize those wires so conduit or tape? If it's strictly a matter of looks, I'll likely opt for conduit.
It'll take a few weeks for this to happen (too much work) but after that, you can bet I'll call you with a lawn chair coach request. Thanks for the offer!