NEW starting problem

[1931 flamingo]

Thank you V8COOPMAN. The generator has two studs, can't discern any markings. One stud is larger than the other and is at the rear, the smaller stud is on the side. The regulator is marked ARM, Field, BAT just like the one it replaced.
It motors with enough force to turn the engine over.
The car had been running fine since the same marked regulator was replaced last year.
Problem started with just the generator humming/slight vibration but steadily got worse. I'm not a wiring guru.
Paul