Thanks for the detailed response!

The connector in question has the release tab, is black in color, is a 6 pin connector, but only has 3 wire/positions in use.

It is located directly under the capacitor.
I was able to pull/lift it of the chassis, although it was a very tight fit to clear the cap terminal.

It is located as the 2nd terminal connector location from the capacitor end of the ev100 chassis. The first 6 pin connector position is void with no connector attached.

I see the flat bladed connection pins you described; I have "re-tensioned" those type of pin connections in the past on other equipment, so I agree with your suggestion, Thanks!

I wish this forum allowed posting photos, but I believe we understand each other with regards to the connector type, location etc.

There is a white banded wire identification number sleeve on the subject wire, and I will try to clean it enough to read it. There is enough grime on it, that I'm concerned any cleaning will removed the printing ID along with the dirt.

I sure would like to get a schematic on this controller in order to fully understand the exact subject wire's destination and function. Im going to try to web search the EV100 controller for a schematic. Unfortunately, I dont see a model/spec ID plate without further scrutiny.

I really do appreciate the help here. I think that now having located the exact wire/pin location causing the issue, I can remedy the problem.

I will report back a follow up after I re-tension the pins and give it a small shot of plastic safe contact cleaner.
Thanks again for the help! :)