Ok, wondering if someone can shed some light on something for me, I've been installing my InCarTec lead today and I've come toa bit of a stumbling block, I've sorted my new Earth, got the 3 wires linked together, soldered and heatshrunk. But out of the white block there's 2 wires that have no plug on them (with black and white, blue and white insulation) any ideas what they are for?