smile this is exactly what I did yesterday evening.

Thanks to Stefan (he sent me a PM) I now have confirmation about the fusebox
He wrote that in the "Completely Morgan four-wheeler 1968 to 1994" book by Ken Hill it is documented that from 1987 (chassis number C7268) all cars got bladed fuses.
Most likely - these boxes have the correct connectors for the one on the picture above.

As I could not find/get such a fusebox - I had to get rid of the unprotected spade connectors.