multi changer connector

[nickyandruss@tiscali.co.uk]

Hi everyone my first post and all that. Can anyone tell me where I'll find the connector wires for the multi cd changer, I would like to find the input wires to the amp so I can wire my mp3 to the car stereo unobtrusively. I'm presuming this is possible as the multi changer must send an audio signal to the amp which can be tapped into. Also the standard cd player is now only playing on the right channel (radio is on both). Has anyone else had this fault and how much was it to repair? Cheers.