Ammeter bypass

IMHO
You should not have to remove any wires from the stock wiring.

Running a wire directly from alternator to starter relay post that goes to the battery will do the same thing. It also gives you two paths through the bulkhead connector to power the car.

You should add some wire protection (ie fuse/ fusable link etc.) to that wire.

At some point in the a body line I understand that the Ammeter became a remote sensor device so the wire from the alt to the battery does not enter the car.