IRB 2000 S3 M88?? manuals

[Joergen]

Hi
I am trying to get an old IRB 2000 with S3 controller to work. The manual set I have, is marked Feb 1990 in bottom line, so I suppose this is for a M90 model.
But from various components production codes, I can see that the S3 control cabinet (and robot) is manufactured late in 1989, and on teachpanel there is a label, (handwritten - original text is worn off) saying M88, so I guess this is a M88 model.

And the connector types and usage on cabinet left side does not match with my M90 manuals.

So can anyone help me with a set (or at least Product and Installation) of M88 manuals?   

joergen.th@gmail.com

Best Regards
Joergen