http://www.mcmaster.com/#cable-tie-holders/=gt4a9g
I recommend the adhesive backed/screw mount model "E". Preferably in black. Use small black zipties and a zip tie gun to run the wires. these mounts are great and we use them all the time to run all our wires and pneumatic tube. They are lightweight, stable, easy to add wires to, and expandable to fit any amount of wires. Removing wires is as easy as clipping a zip tie, and because the adhesive is on the back, you can trim off edges if need be with a band saw to fit in tight spaces. We also use small stick on numbers on each end of every wire. The same number gets put on the PD board and the motor, jaguar, etc. So each motor has its own wire setup. For pneumatics, we do the same thing with colored tape from the solenoid to the cylinder. Good luck and I hope it works out!