question on bulkhead connector bypass

The alternator terminal you connect to would be the big one with the 1/4 (?) bolt with the nut on it. The above described process only solves part of the problem. It only reroutes the alternator charging current. All the current to run the car electrical system still goes through the bulkhead connections. The ampmeter can stay connected, but it will read “discharge “ all the time because the charging current doesn’t go through it any more, rendering it useless