I wired our Ray Marine C80chartplotter, autohelm, remote stero through an Edson double bend pedestal guard. Splicing the wires was no big deal.
The holes are 9/16" and i used fishing line with a bolt as a messanger line to pull up the wires. This all fits right behind the two navpod holders so everything is neat and no wires are seen. I ran the wires right out through the feet under the cockpit sole Maake sure you use rubber gromets to outline the holes and the foot of the guard.