check out these pics.
house built in early 1960’s
panels in bedroom closet
almost 100% that the small box is acting as the 30 amp overcurrent for the AC.
power supply to it is the double tap on the 50 amp breaker at the top right.
I understand the double tap is wrong.
I also understand that the white “hot” wires in the smaller box should be labeled black.
Single self-tapping machine screw was holding the front cover on.
Am I just looking at an issue of support/protection of the romex hanging outside the panels?
Am I missing anything else?