1952 f1 voltage regulator

[dmsfrr]

Originally Posted by 56markII

That extra terminal was if my memory serves correct was for cars and trucks that only had an "idiot" light instead of a guage. My 59 Ford only had a light for oil and charge and this wire went to this light. .....

Not sure which 'extra terminal' you're referring to.
In the '55 & '57 cars I looked at, and in the '57 wiring diagram (linked above) the wire to the Gen idiot light comes from the 'A' terminal of the voltage regulator.