Typical RC connectors. On left is Futaba J connector on end of servo cable. Black is normally used for negative battery wire. Red, or positive, lead wire is in the center. On the right is a white wire for signal function. Next are mating halves of a Hitec connector. Red positive lead is still in center. Hitec uses yellow for third, or signal, lead. At extreme right is mating set of Deans three-pin connectors—the only connectors you can easily solder. They are popular with do-it-yourself modelers.
Typical RC connectors. On left is Futaba J connector on end of servo cable. Black is normally used for negative battery wire. Red, or positive, lead wire is in the center. On the right is a white wire for signal function. Next are mating halves of a Hitec connector. Red positive lead is still in center. Hitec uses yellow for third, or signal, lead. At extreme right is mating set of Deans three-pin connectors—the only connectors you can easily solder. They are popular with do-it-yourself modelers.