Use the 6 wire flat cable to connect both modules.
On the back of the Light module, use the 6 pin connector placed at the top. The pin connector has a small white line on one side and a small text “RED STRIPE” indicating the orientation of the cable connector.
On the back of the Traffic module, use the 6 pin connector at the top named “INPUT EXT.” Follow the small white line and the small text “RED STRIPE” to correctly place the flat cable.
Use the following picture as a reference:
