Screws to lock the board on the back of the box

[Domdsq]

Hi everyone, I need to know which screws to buy to be able to fix the card directly to the back of the box (as indicated in the photo). I need to remove the front part of the box because in the European control panel the default box does not fit, it does not allow it to be closed correctly, so I have to find the correct screws to be able to do it. I attach photos. Thank you