wiring on aftermarket alternator

I just bought a small alternator and it came with a jumper wire for the field to make it a one wire alternator. It says in the instructions that with the jumper wire the alt. pulls 300mill amps. I could just run a whole new wire for an ignition point but don't want to. So I was wondering if I can just one of the normal field wires. Will that work or withe voltage regulator prevent it from having a full 12 volts all of the time? Oh the new wire is self regulating to 14 volts.

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