MAD Bypass Question

To answer the OP, no problem leaving the ammeter wired as is. You don't buy much by connecting the two wires on one terminal other than in some clusters those terminals are iffy (corroded, can loosen). The main goal is to give a direct underhood path from ALT to BATT+ to keep large charging currents off the bulkhead connector.

The cleanest relay approach is to rewire with an underhood fuse/relay box from a newer car. I posted on that years ago "Modernized engine wiring ...". 67Dart273 did similar. I also posted a way to bypass large charging currents while leaving the ammeter active by use of a large diode pair, but beyond the understanding of most.