How to plug a drainpipe hole in particle board?

[rocker]

During a recent renovation the plumber had to penetrate a particle board cupboard at the corner, as per the photo.

Clearly there was no corner flange to cover the entry hole, unlike the exit hole which does have one.

Does anyone have a solution to filling that hole?

Thanks.

[Noyade]

Yes - I see now! @MitchellMc 

👍