pinouts for cd steering controls

[orinoco74]

i just picked up a blaupunkt lausanne cd30 from a scrapyard and it actually works lol. i got it cos it had the same extra pins for the steering wheel controls. When i got home and hooked it up and the cd player and radio all worked fine, but the steering wheel controls did not. I understand that cos i got it from a vauxhall that the pins for the controls are probably in a different order. would anyone happen to know the difference so i can change them over and get my steering controls working?