Bosch Rotak Lawnmower Power Cable Connector Part

I'm trying to find and purchase the part circled in the below picture which is part of the power cable connector for a Bosch Rotak lawnmower but am struggling as I'm not sure what it is called.

It's a tab/cover to protect the connections which is flipped back when inserting the connector into the lawnmower.

Anyone know what it's called?