I appreciate the responses and I’ll be sure to order some wire harness smoke.
For now, I bypassed the ammeter to get the car running and the now dead gauge is occupying the hole. I installed a 100 amp waterproof automotive circuit breaker where the ammeter used to be. I’ll relocate the breaker to the passenger kick panel area at some point as part of an ever increasing laundry list of things to do with the car. I’m not sure if I’m going to remove the original gauges and replace them all with some classic looking Autometers yet, or just order the voltmeter from Hall.