Take 30cm of 5 core wire and splice them to the taillights.

Strip each of the wires back and crimp the terminals on.

Crimp the terminals on each of the wires.

Plug the wires into the 6 way Deutsche connector in the shown orientation

Ensure you insert the green wedge into the plug.

Strip back each of the wires on the taillight loom on the vehicle and crimp the terminals on.

Place some heat shrink on each of the wires behind the terminals.

Plug each of the wires into the plug in the shown orientation.

Install the taillights and plug the Deutsche connectors together ensuring the loom sits behind the chassis mount.

Cable tie the loom securely away from any hot or moving parts.