th wire runs from the top passenger side of the rear window to the floor just behind the door then across the floorboard to the area behing the radio. i was told you can buy an adapter at radio shack but the one i went to didnt carry them anymore, but told me to try any car audio place as the will have them to connect different stereos. i paid 7 something for mine, it about 8 inches in legnth has the small plug on one end and the larger on on the other.