one wire Alternator and voltage regulator question

no sir, not 100% sure. Although that battery was around 5 years old and it sat for most of 2020 while the engine got long blocked. The cold snap we had last month seemed like the coup de grace.
On the other hand this is the first time I've had the wire harness out of the electric tape (mine since 4/11) I am up to 6 dead end wires and 2 had some charge to them when the key was on. Most of them seem to be sending unit wires for old instruments and I've been eliminating them as I go.