Wire color...

[Jon Stratis]

On the contrary Al... we find using two colors to be helpful and to help avoid confusion. If you need to disconnect something at any point from the speed controller, hooking it back up could be confusing if both leads are the same color - potentially hooking it up backwards could be an issue.

IMO (which is not the opinion of the GDC or the inspectors), It's always beneficial to use two colors for motors, and always have them wired to the speed controllers in the same way (red to the M+, black to the M-, for example). This way, you can avoid mistakes a lot easier, and ensure you always hook it up the same way for your programmers (or they'll hate you when they have to change the direction of things in code constantly).