Battery draining overnight

I think I’ve finally got my head wrapped around how the wiring works in these cars now. I went ahead and did the MAD bypass because of the horror stories I’ve read lately about the bulkhead connectors and factory ammeter melting (was able to neaten other wires in the process). I’ll just get an aftermarket ammeter when I make my new gauge cluster. Now that I have disconnected the alternator and done the bypass, everything is working and the battery no longer drains itself. Once I figure out what to do with my alternator I should be good to go.
Huge thanks to everyone that had input on this mess.