I have a 55 plate 307 1.6 hDi. It has a standard single disk radio etc. I've just got a 5 disk changer and lead... however the back of the si gle cd player doesn't appear to have the connect for the changer cable. Is this something I can buy separately ( ie an adaptor from the original stereo) from the donor car or do I need the whole thing. My last 307 had one when I got it.. Thanks P's first post :)