[Ronbo]

On reading this I would suggest using clamps or even #12 electrical wire to tie the wires down. Nylon tie wraps can degrade over time and become brittle. The UV stablized ones hold up best make sure that's what you have. (just cause they're black doesn't mean they're UV stable) You can get T&B's at most Home Depots.

Definately don't want any wires coming loose to rub / snag on the driveshaft.