Pleased you have a driveable car Laurens. From what you have found/told us no reason to suspect the engine/chassis connector. I would be tempted to leave that alone unless you have a related remaining issue.

Do you still have the hazard lights back feed to fuel pump issue though?

Richard

2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone