2 amp HK stereo wire map, 2000 onward

Has anyone partially or fully mapped out the wire/ pin usage on the post 9/99 build Harmon Kardon dual amp system into the HK amp and from the HK amp to the subwoofer amp?

I'm especially interested in the map for the regular amp to subamp cable for the Sunfire (which I assume is the same as the original HK sub amp cable).

"DWM" on Roadfly did have a partial map, but I have not been able to locate him or his plug map.

I've been following the trials and tribulations of retrofitting a sunfire amp and one question I noticed is never asked is the following:

Does the cable between the primary and subwoofer amp have a part number? If it does, can't we just order it and hack it up to work with some sort of pre-amp out?

No one has hacked it for that purpose yet. DWM posted a partially hacked set of pinouts, but his site and email are no longer in service. I did manage to snatch the initial hacking.

From his site (DWM, I'd ask your permission if I could find you...): attached as a PDF inside a zip file.