**UPDATE**

I pulled the starter and the battery cable. Once I cute the harness tape of off of it and compared to a known 4ga wire, I think these cables are 6ga! eek

I am guessing my 2ga upgrade should be way better than what I have...

Also, when I went to loosen the solenoid terminal, the whole terminal just fell out.

So I think I had two problems...failing connection and 6ga cables. Wow how did this thing ever start??