I'm trying to hook up an extra brake light to my 2011 Nomad 1700. According to the manual you have to remove the rear fender in order to work on the brake light wires underneath. Is there any way I can hook this up to one of the wires under the seat? If I can, which one is for the brake light. The one I bought has 3 wires, one for ground, one for running light and one for the brake light. Thanks for any help.