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

this is first time I have tried to put a picture in a post. And I may have overdone it. Now that I take pic, I clearly see both wires have been cut off the Alt. gauge. I do not see any matching wires.
I included the shot of the Fuse box, with the brilliant idea of grounding to one side with a small green wire?
Also a good shot of the Dimmer switch which just came apart. it really wasnt even connected to the switch. And some disconnected wire plugs, which are near the fuse box, appear to be pink or purple wires . and a cut wire again.

Be advised, this guy had a huge Stereo system with wires and power amps and speakers everywhere. he pulled it all out but many wires remain. I am attempting to reconnect the original Radio, but that is bottom of list.
No NAPA here. only AutoZone, Pep and Oreilys. the Headlight switch should be here in an hour.. But I am still doubting that it is the problem. Many thanks. Damn bulkhead pics look upside down?