I have 2 HD circuit breaker bases, 48-60 style(late style points), with a cutout opposite
(180 degrees almost exactly) to the cable post slot. Both cutouts in both bases are 3/16 deep from the bottom up and 2in. long. The cutouts appear to be machined or stamped in and the one seems to still have cad plating in the cutout. Is this factory or was it modified for a reason?
Thanks. Bob Rice 6738