Instrument lights don't work

The cut wire is on the right side of the picture, you can see where it is cut at the bottom of the photo. It looks reddish to me.

I'll need to get a tester, my multi meter is dead apparently.

I haven't found a service manual for 65 yet, I've been referencing a 66 that I got from the page you listed. Waiting on the paper manual to come in the mail currently.