Hey Mark, you don't have to worry about plugging the servos in the incorrect spot on the receiver. The worst that would happen, is that when you test out your radio you would get an incorrect response. You would do this before trying to fly your plane. As far as ware to plug in the servos, most receiver's just below the port should indicate its function. If it does'nt, you will have to plug them in by trial and error. I'm assuming that you already have your servos in place. If not put them ware you want them and give it a go. Good luck

Henk