SP21 connector is  a large sized plastic shell IP68 waterproof wire connector.The user can attach the wires to the connector by solering & screw.

OL13 series connector can instead of SP13/SD13. There are many poles can be chosen. And you can also choose wire to wire or wire to board.

The underground waterproof wire connectors can be used for both cable to cable (in-line) or cable to panel-mount connections.

The waterproof wire joiners can be used for both cable to cable (in-line) or cable to panel-mount connections.

The watertight cable connector can be used for both cable to cable (in-line) or cable to panel-mount connections.