Ignition Switch Connector Fail
That will have some different wiring than a Valiant or Dart.
You're going to have to track down what caused the damage. Some of those wires show more than just a little melting - and well beyond the connector.
With the pin type connectors, use a small hollow tube to release the barbs.
With flat connectors, use a flattened pin or small screw driver. Shown here:
1969 Dodge Dart - Engine Compartment Main Bulkhead Connector
These tools to remove the terminals from the plastic housing are available pretty cheap.
Download the 1972 shop manual for yourself.
post photos of the wiring and we can probably help you.
The '72 shop manual diagrams cover everthing but can be challenging the first time you go to use them.
Copy just the circuits you are working on onto a sheet of paper or computer drawing.
See how things are different than the 1970 A-body drawing?
For example, look at the S2 wire. They are both yellow but in the '72 Satellite a 12 gage conductor was used.