Cable joints are also called cable heads. After the cable is laid, in order to make it a continuous line, each segment of the line must be connected as a whole, and these connection points are called cable joints. The cable joint in the middle of the cable line is called the middle joint, and the cable joint at the two ends of the line is called the terminal head. The cable connector is used to lock and fix the incoming and outgoing wires, playing the role of waterproof, dustproof and shockproof.