Here's a technique I use to match up servo leads when I have more than just ailerons to connect. In this case it's on a new twin fuselage Sky Raider, the T-Raider, where I have to connect rudder, elevator and throttle to extensions from the receiver in the center wing. Instaed of taped on labels that can get dirty and obscured or rolled up and hard to read, I use colored zip-ties. Here I have used white, black and red. All I need to do to hook up is match colors.