How is the IP for my '70 cuda grounded? I just repaired the tack and put it back together and am having some electrical issues.

Does it matter what ammeter posts the (3) Red & (1) Black wires go to?
Thanks

' '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...