Battery draining overnight

I installed the 8 gauge wire, but instead of just capping off the ammeter wire, I connected both ends in the engine bay to the big post on the starter relay, and then connected both ends of the interior side to a single post on the ammeter.
I think I follow what you did.
The one drawback (ignoring the loss of the ammeter) is the lack of protection from battery grounding.
While the fusible link from the battery feed/charge line is still there, the original alternator feed has no protection. Nor does the 8 gage wire. If the alternator's output circuit internally grounded, then the battery would feed as much current as it could down that 8 gage wire until something burned through. :eek: