It looks like this is incorrectly wired (6th image down).

I don't believe there should be the black lead from the alternator Ammeter post to the housing (tach mounting post/nut).
This would be a direct short from hot ammeter to chassis ground.

The Black lead to the Ammeter is battery supply line.
The Red is the load.
I am trying to wire my (4) leads going to the ammeter.

' '70 Cuda convt - 383 bored/ported, Hemi cam, Rhoads, rollers, Mellings, MSD, 750 DP, LT dual 3", lowered, snubber, police chuck, discs, springs, sway bars, Transgo, posi, shaker, aluminum 17" rallyes w/275-285/40 EXTREMECONTACT SPORT, leather...