1968 Dart Fusable Link?

This is from the '68 Plymouth shop manual showing the back of a Valiant instrument panel. Ammeter connections are the studs directly above the headlight switch.
If you can see them, maybe with a mirror, great.
If not, I'd check for battery voltage at the ignition switch and the alternator output wire connection at the bulkhead. If those are hot, then the circuit through the ammeter to the mainsplice is connected. That's not a guarentee the connections are really good, but just that they are connected.
upload_2019-3-21_20-31-13.png