Mark,
Try using a "momentary" jumper from the "A+" (or battery terminal at the starter solenoid) to the "F" (field) terminal. DO NOT make this connection for more than a few seconds, as this will (should) cause the alternator to produce max output.
You don't need to have a second person to help. Just start the engine and MOMENTARILY make the connection. You will hear the engine RPM drop as the alternator "loads" the engine.
Or, you can disconnect the wires at the "I" and "S" terminals, and connect a jumper wire from the regulator's "S" terminal to the "A+" (battery) terminal, as in the diagram below.
John
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