Cheoy Lee Wooden Mast Question

[Brion Toss]

Hello,
First, are you sure they're solid? How ridiculous that is. So my first choice would be to see if they are large enough to hollow out, and then the wiring could be run inside. Solve two problems at once.
Since that's not likely to happen, the trough is a good second choice. You could also replace the core of a double-braid rope with the wire, then stopper the rope/wire to a shroud. Looks like a halyard at first glance.
Fair leads,
Brion Toss