I am looking for color codes, or pin order of (BMW Business CD, w/o DSP and w/o NAV) factory amplifier. I am installing amplifier and subwoofer (Basslink) and looking for the best place to tap Basslink to signal lines.

I have already factory amplifier "in my hands", so it would be pretty easy to tap the Basslink to back of this amplifier (speaker lines), but I just do not know correct pin order or color codes (and my IE is not working, so can not look the online WDS).

Does someone remember the colors, or pin order of rear and front speakers?

Of course, I can measure signal levels of these lines, but it could save some time to find the correct lines without major testing.
I would appreciate any feedback a lot, my car is waiting the sub