Ummm the ccr is the tape and cd changer unit? I can't really remember the numbers. If it's a cd headunit I'm not sure if it'll take the cd changer.
If you take out your glovebox have a look for a connecter around 3/4 of an inch long with 12 iirc holes for pins in. Aranged in 2 rows. That's the changer lead. If your car doesn't have the lead and you need to rape one from another vectra, alls I can say is good luck. It's fixed at diifferent very hard to get to places behind the dash.