Not sure which of my disassembled trucks this was on, and don't remember which post is which. Center electrode for the distributor is on the bottom, by-the-way.
Coil Photo So which post gets the wire from the ignition (key) switch, and which one gets the wire going to the Points?

BTW, '41 Chevy 216, 6-volt, ton & a half Fire Truck (Red)

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-Michael