Thanks for the input.

I am also going to use the landing/taxi lights that came with the plane (non LED & high current) and the Aveo Powerburst nav/strobe/position lights in my wingtip. Garmin also gives a distance to keep away from high power carrying wiring.

If I put the AHRS out at the wing tip then it seems it will be best to run all of the other wires inside the front spar, put the AHRS as far back as possible on the outboard rib and run its wiring in the aft spar or trailing edge.