These are bits from the 37 120 factory wiring diagram which you can download from the literature archive or is in the 37 shop manual. If the 2 coil regulator which appears to be the Autolite version is similar to your replacement the diagram might work with what you have. There are two drawings showing Autolite and Delco regulators with slightly different placement of wire numbers to the generator.
Attach file:
2 coil reg.jpg (106.41 KB)
37 - 120.jpg (176.11 KB)
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