Blaupunkt Head Unit Looking To Hook Up Blaupunkt Head Unit In A 1988 BMW 325 4dr Sedan.?

Looking to hook up Blaupunkt head unit in a 1988 BMW 325 4dr sedan.? - blaupunkt head unit

Already in 1988, had no CD drives the car, so I'm wondering if there is a way to integrate this with the vehicle. The problem is especially wiring - the colors are different and you can receive information about what to get a connection to what. Any help is greatly appreciated. Thank you.