I installed LED Edge fender tail lights on 2015 Free Wheeler. I disconnected wiring harness that goes into the light bulb of the OEM taillight. I used that to connect to HD OEM taillight circuit board and mad it plug in play so if I later need or want to change lights I am able to just unplug or add accessories to the circuit board with a HD harness. Lights were $30 on Amazon, you can find the harness on HD if you don't want to cut the light bulb harness.Hope this helps out....now to put eliminator for license plate relocation.