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Fitting a towbar and 7 pin plug. Got a bypass relay for the wiring. The instructions say not to connect up, what is the tail lights, if the car shares a feed connecting both tail light and brake- which the DS3 appears to do. There is also a separate / additional wire in the car to each side brake light. The bypass relay only has one cable to connect to the brake (not one for near side and off side). Does this mean I should connect the one terminal / cable from the relay to both the car's near side and off side brake wires ?