1959 Imperial doesn’t charge and not sure how to tackle this

Question: My car doesn't charge. That is a bit inconvenient. But I am not savvy with generator cars, I get my way around a alternator car, but this is all new for me.

I did notice someone has been butchering into the wiring, there is some loose wiring and the routing is new to me, including the components.
I can tell the generator and the regulator, but I see wires go to a device in front of the regulator, what is that?

There are also 2 loose wires, which seem factory wires to me, where do...

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