The ip68 waterproof connectors can be used for both cable to cable (in-line) or cable to panel-mount connections.

LP20 series there are many poles can choose. Widely used in power and signal.

OL21 connector is  a large sized plastic shell IP68 waterproof wire connector.The user can attach the wires to the connector by solering & screw.

IP68 Waterproof Cable Connector securely splices cables up to 5 conductors. Ideal for outdoor lighting systems or humid environments, this accessory has durable plastic housing and rubber gaskets to resist corrosion and seal out moisture.