Thanks Viny, 1. We did remove the negative terminal. 2. Although we have connected the wire to one bulb, we routed the black one over the white cover. I hope the cover shields the wire from too much heat. 3. The wires are translucent ones with one side wire striped green. they were not cheap at 8/meter and are pretty hard. 4. We taped the the couplers with insulation tape and used 3m tape to stick it to the body.