Ok guys, I'm getting good at this. Apparently found the answer to my own question...
Congratulations and thank you for purchasing the BMW/ALP DMX V.1 electronic converter. The most advanced converter available for BMW radios (1996-2003) to alpine CD changers. This electronic interface converter is the only converter that will allow the BMW (1996-2003) Becker or Alpine radios to interface with the alpine CD changers.
Compatible BMW Models: 3 Series (1996-2003), 5 Series (1996-2003), 7 Series (1998-2001), Z4 (2003), All X5 even DSP models (2000-2002)
Compatible Alpine Models: Alpine CHA-S601, CHA-611, CHA-620, CHA-630,
Compatible Alpine models with use of Alpine part# KCA-130B: CHA-604, CHA-614, CHA-634
INSTALLATION INSTRUCTIONS:
1) Locate the BMW factory CD changer cable on the left side of the trunk. (3 and 6 pin)
2) If using an AI-net changer (using Alpine part # KCA-130B) flip the switch behind the changer door to position # 2
3) Plug the 8 pin din connector from the CD changer into the 8 pin connector on the Blitzsafe interface. Plug the 3 and 6 pin connectors into the Blitzsafe interface.
4) Mount the CD Changer
5) With the radio off, turn the ignition to the on position, turn the radio on.
6) Press the CD button on the radio (to switch between in dash CD and trunk mounted CD changer just press CD button again).