For all of you builders that are wiring up a typical Ray Allen trim servo, you know that the two “power” wires to the motor are both white. If you’re like me, you will use bench jumpers to connect and disconnect them many (many) times before finalizing the assembly. Once you have figured out which wire connects to which – to drive the servos in the correct direction (remember, tab up, elevator down, nose down), put a little piece of heat shrink on the matching wires (servo to airframe) so that you don’t mix them up.
I used green because it was the first thing that fell out of the drawer.