I purchased the Supernova E3 2 Taillight with the Seat post mount on Ebay from bikewagon. They had a competitive price and timely shipping. Any of the Bosch dealers in your area should be able to order the wiring harness for you. For all of you with a Felt electric bike mine is the nine-e 20 they come with the front light already pre-wired. You can find it in the wiring coming out of the top of the frame. You will have to buy the Bosch rear harness if you are going to use back lights. If you want your light ports on the motor activated you will have to take it to a Bosch certified dealer. If you purchased the bike there they should do the activation for free. If you are near Laguna Beach CA Kevin at Electric Cyclery has the know how, can to do the activation and usually has the wiring harnesses in stock. Tell Kevin Jeff sent you. Hope this helps all of you that are thinking about using the bike battery and console switch on your Bosch powered bike. It wasn't easy getting a straight answer on activating the light ports. Good luck and if you have anymore questions feel free to ask. When I get a chance I will post some pic's of my install.