Hi Mike, I'll admit it takes a bit of finding if you've never done it before!
Look right at the top of the page. Here, it says Manuals.
Under here, there is a heading Contax C/Y mount:-
For those of a cynical nature (not you Mike!), I'd hate to be accused of condescension by posting these screen shots. I find it easy to do .....and as this is a photo connected forum ..... anyone should be able to appreciate that a picture is better than a thousand words!
It's a shame that I should even need to justify my method of help, but I have recently seen a few ex&les of good-willed help being shot down for what might appear to be no more a "sin" than that of being read by "more of an expert" than the answer was intended for! Sigh!
Anyway, I hope Mike finds it useful.
Cheers, Bob.