I was just thinking more on this and almost all of my aileron servos have three separate & connected runs. 6" to 12" to get from the receiver to the wing bay. I connect there when assembling at the field, and the line in the wing will have a jumper to get a few inches loose wire so they can be connected. Have done this many, many years. Much easier that trying to plug directly into the receiver. I mark the mating connectors with like-colored cable ties.