hi, looking at putting a factory stock radio back into my 1990 R32 GTS-t type M, just picked up a gts-t radio off ebay and seems to be a different (2 pin) plug on my cars wiring but only a small opening (single pin size) on the back of the radio , have i gotten the right radio? is the radio for a type M different to the gts-t? i seem to have a lot of extra wiring back there!any advice appreciated please