Problem with interior fuseboard connector.

The replacement fuseboard came today but I must have done something to one of the connectors. There are two similar ones 587 and 588. The yellow one goes in OK but I must have done something to the grey one. There are tabs that should be flush but are stopping the connector going in. See pics. Does anyone know how to remedy this please?

I have sorted it. I could see it better in the picture than I could in situ.

Try to work it in with a thin flat screwdriver where the blockage is or whittle it a bit with something as long as just the plastic is in the way

EDIT we posted at the same time