FreeSmall Wire Looms with snap on caps that I made when running speaker wires for an 8 speaker system in a pavilion. They worked out great as you can screw these in place and then run all your wires and snap them into place
Thingiverse
5 model
5 model
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse