You can even just split the wires and tie the postive and negatives right in. That way, power goes to the reciever and servos both. I like doing this on tail servos (rudder, one or two, and two elevator servos). If running one battery, I run two leads off of it and do the spice into the tail servos Pos and Neg. The other lead goes into the reciever. If running two batts, I run one into the tail servos and one just into the reciever. In both scenarios, the ailerons, throttle, choke, etc get their power from the reciever. I also run two switches, one for the tail and one for the reciever. Turning either one on powers the whole plane but if you don't turn the tail switch on, they don't get the direct battery power, it would come out of the receiver.