Juliet: Any further updates on this issue?

I ask because this weekend I opened up the "selector" panel to look for some abandoned inverter wires. Much to my surprise I found a black wire running from pole one on my 4 pole breaker to the "trip" breakers where all removed and taped together to another black wire on both 120V banks.

One of these pairs was loose and when I moved it, I heard a clicking sound from behind the electrical box (which I did not locate). Anyway, I thought this might be a safety issue and hooked them back up to investigate. NO issues found yet and my "test" button now properly causes the breakers to trip, where they didn't previously.

I have a 77 58LRC, so hope to hear from anyone that has any insight regarding this issue.

J