Try removing the pins from the connector by lifting the pin retention tab. A jeweler's screwdriver or something similar can be used to lift the tab. Put a mark on one of the wires and the connector so you can reassemble as original. Removing the pins allows for a more thorough inspection. New pins are most likely available, but finding the correct part number can be challenging. You may be able to carefully bend the pin contact area as a stopgap until the new pins arrive. edit: Seeing the actual pin may be helpful in finding a replacement. Once one has replacement pins, it is a couple minute job to crimp and reinstall the connector. Glitch

Thnx a lot @Glitch! After checking the connector block close by, I could see the release tabs. Pulling them a bitt outwards indeed enabled me to pull the wires and the internal terminals. After that I was able to reconnect the terminals better to the wire. All fine now!