Hot ammeter

RE: First identify and fix the problem.
One common problem on especially in 70s models is a leak: Redfish (who worked at Chrysler dealerships) has mentioned that here
[Found!] - Ammeter Gauage for 74 Duster
and here
Electrical gremlin

If the ammeter's studs are loose from the connecting plate - that creates a poor connection.

A lot of people think the ammeter causes the problem. Sometimes they do, but often they are the victim. When there is excessive current in the battery feed line the connectors got hot, very hot. Again if the studs get loose from the plate, it results in a poor connection, and more heat.

In this case, IF those are the only overheated connectors, then maybe the cause was a leak and or damaged connectors. IF other connectors showing overheating will be the clues in tracking down the source of the problem. Look along the circuit at the other terminals and the wire at the crimps in addition to the condition of the insulation and plastic connector housing.
Some melted wire connectors shown here, including a ammeter connection which we know exactly why that happened.