Headlight switch , is it the cause? or the curse?

So replacing dimmer switch got me the headlights back.
Thanks so much for your help.
Now when I click the dimmer, I hear small squealing noises (I think it is when I am going to brights). I click again and the noise stops, also I'll lose the lights when it squeals. So there is a short, and the dimmer switch connector is very hot. It is also melty (was melty before).
This also matches the melty on the Bulkhead, though at Bulkhead the majority of melty is at Z, sort of melts into Y. I think Y is the High Beams which is the short. So I think in the Bulkhead it is arcing between those two due to melted connector.
I have ordered a new Dimmer switch connector, will be here in an hour. But not sure how I deal with the bulkhead replacement. Also I got my Packard 56 connectors so I am set to fix the bulkhead if possible. Now I guess I do see people saying to drill through the bulkhead and straight wire it. rather not do that, but not sure any other options if I can't find a connector?

I plan on removing entire dash and trying to figure out why no guages work, and why there is no dash light. (Dome light works BTW ... mini-chub)