Actually just found this windshield add on moulding - https://amzn.to/3NCnk4r
Should work perfect, heat build up might be a bit of an issue but Im using 12awg for 4 led pods so works for my application.
How have you guys routed the wires for your roof rack electrical accessories? I'm getting ready to build harnesses for camp lights around the corners of my rack and I'd really rather not route through the cab and spit out the back only to extend the run all the way to the front of the cab again...