I've used a schematic from a 94 Roadmaster to verify most of the wires. All of the wires coming form the standard GM radio plugs are accurate and known.
The one that has me slightly stumped is the 7 pin Black Connector shownn in the upper left of this picture.
It has two wires. Pin 3 is the Ppl/Wht, for the Automatic Dimming of the AC control unit. The Dk Green wire is pin 7. Everything I can find suggests it might either be Steering Wheel Controls or maybe Speed Control Volume- Both use Dk Green . In either case, I do not plan to use either of these two functions- just want to make sure I'm not leaving a circuit "Open" that should be attached to something.
Thanks again for your help. The schematics I've got access to just don't go far enough.