This post has pictures of the din plugs for the head unit so you can add them to the plug fitted to the car
http://www.zscentral.com/phpbb/viewt...hp?f=21&t=8027
all you need to do is link this end to the wires that come from the rotery coupler, either at the coupler end or on the grey plug that is to the left and above the main internal fusebox.