[BrianAllen]

Try as I may, I just don't have the experience of wiring diagrams, to identify the orange wire from the soldered lug on the transformer leg/support (there is a black wire on the lug which comes from a tag on the transformer).

Does anyone have any idea where this orange wire should be attached?

Thank you.

P.S. I am still searching for a CL 33 valve; have tried all of the usual places but still no luck!!