That's the one. I think it prints on a D or E sized sheet. Would anyone here happen to have the document part number for that? Or a copy of it? I don't need it myself but if someone found it online I'd check it out just for nostalgia.
With it, and some additional documentation, my car radio was a four zone 64 channel Syntor X (ABCD zone board plus the 16 channel rotary head) interfaced with the siren/PA board, and if I remember right I even had an MPL board in the system. All made possible via the Systems 90 bedsheet diagram. I even custom painted the housings to match my car's interior color.
Come to think of it, I think one of my friends still has the entire rig. I gave it to him. I could probably get it back just by asking.