the S3 im interested in has the concert II bose head unit. I understand this is a single slot CD?

what inputs are on the back as i would want to plug my minidisc playing into it. I was thinking i could just get one of those tape adapters but if its a single slot cd...that obviously wont work!!

failing that...is it easy to swap from the concert II back to a standard concert and then fit a cd changer. then i would have the tape drive so i can run my minidiscs..