It runs down the passenger side and then up behind the glovebox to the HU. The HU end is a mini ISO connection but is on a plug with your DIS feed and front & rear pre-outs so you can't easily separate it unless you have the multicolored plug on the end, in which case it's the blue section which slides off. Don't really know what you're trying to do, as the problem won't be anything to do with the cable, probably just a dirty lens in the changer.