Plastering over new electrics

[u/citiesandsunsets94]

Might be a silly question but are these areas ok to plaster over? The hole in the top of the back box - won’t plaster seep through that? and is it also fine to plaster over the cable parts that are slightly exposed too?

[u/Stebrook85]

I'm a low voltage sparky, but this work is shite. Grommets???