Ok just so I understand my options are to either cut the entire connector off and just put a new connector in or remove the burnt terminals and replace them with new ones?
No, cutting off the entire connector is not an option! If you need to replace the plastic connector bodies, you will have to unpin all of the terminals, keeping track of where each one goes, and insert the terminals in the new plastic body. Of course you will have to replace the burned terminals. If there isn't much damage to the plastics, you can just unpin the terminals that are burned, replace with new terminals, and reinsert them in the original connector body.
The other option was mentioned twice, and also by Toughsox. That was to splice a wire around the outside of the connector, eliminating the burned terminals inside the connector.
The only cutting that will have to be done is if you run a splice wire around the connector or replace the burned terminals.
Let us know which way you decide to go and we can provide more detailed assistance.
Option 1. Cut the wires that have the burned terminals, connect a splice wire between the loose ends of those wires.
Option 2. Replace the burned components. That will require, at a minimum, unpinning the burned terminals, replacing those and reinstalling them in the connector. If the plastic connector bodies have excess damage, that will require removing all of the wires from the burned connector and installing them in a new connector.