80 Series Factory Stereo Wiring

Hi all,

Does anybody know the what for and colouring of the factory stereo with cassette players for an 80 Series pre 1995? I have purchased a new stereo head and have sorted the speaker wiring, but cannot workout the wiring from the second loom from the wiring docs I have.

Also the factory stereo had a blue/white wire and a red wire that connected to the power aerial, but my new stereo only has a single blue wire for this function. I was wondering if the factory wires were for power up when radio on, then power down when tape player on??? Does anyone know which of the two wires I need to connect my blue wire to and whether I need to disable the second wire?

Cheers and thanks in advance