i have ORANGE RED BROWN. This is the end of my CC Mamba Monster that connects to the Receiver. I was always confused by this and wondered why they didnt just use red/black/white. anyway thanks!
The red is positive, brown is negative, and orange is the signal.
Easy way to remember is that the positive wire is the middle position.
Incidentally, this orientation is the reason why you won't fry or damage anything if you somehow hook the plug wrong (flipped it); the servo simply won't run.