I see... this part number is a dublicate/replacement for 65 12 0 153 503... priced rather more attractive than the 503 part... this one is good if you have a pre-wired connector hidden behind the monitor already... there are three variations of this harness
65 12 0 153 501 - E46 with SA 661+650 only
65 12 0 153 502 - E39/E53 with SA 661+650 and E83/E85/E86 with SA 662/609 only
65 12 0 153 503 - E39/E46/E53 with SA 602/609 only

this is what i built for myself for about $5 in parts and cut in my desired length as my AUX is gone to the central console storage bin... I have a post on that in my 4.8 to do/done thread...