I have a C66 where the internal meter is disconnected.
I would like to reconnect it and need to know how the green/white/yellow were connected to the ABC springlocked-points at the LP1 Main board.
Also there is a modification where the mains and 12 V inlet/outlet are located. Seems the switching triac or such (mounted to the metal plate) was taken out of the loop.
I still have the meter I removed from mine in one piece.
I'm away from my darkroom for a couple of weeks, but I'll take a couple of photos of the wiring when I return, which should help you. I also think I might have had a photocopy of a wiring diagram at some point, don't know if it'd be any use but I try to dig it out for you.
I have a multipage repair printout - will scan and email it to you. I have a C66 that I converted to manual use a few years ago by removing the sensor/timer unit. Kept everything else and it works like a Durst (which it really is). Robert