nacho, if wiring from scratch [think hotrod, custom harness, no bulkhead plugs], how would you tie in an amp meter ? same as the factory method plus using the bypass ? volt gauge will also be in use.
if no bulkhead, just replicate same stock config. All loads ( but starter motor ) must be taken from alt side of the ammeter game.
This is if a full load ammeter, because shunted ammeters are quite diff. Dunno if you are using stock or aftermarket ammeter
With a Charger born in Chrysler assembly plant in Valencia, Venezuela