Those of you that have bought HID kits; do they offer a connection harness to our car or is there always splicing involved with HID's? Just wanted to know since I will possibly buy an entire retro-fit kit coming off an M3. Basically i'm getting the factory HID bulbs,ballasts/projectors of the BMW, but if there isn't splicing required with new HID kits, i'll just buy the HID's new separately with harness if available. thanks.