If you're swapping a Radio cassette for a Radio CD player I suggest you take the unit to an autostore or Halfords and get yourself a wiring plug adaptor, they're available for all makes of car and most of the multiplug connectors on CD players are pretty standardised nowadays. It's then just a matter of plugging the adaptor to the vehicle plug from the origional unit and the other end into the CD.
JW
May 2006