I need to drive screws through the side walls of the dishwasher to secure it to the cabinet. When I remove the caps that cover the hole meant to take the screws I see a problem. I expected to see holes about the diameter of a screw but instead there is a big hole straight through to the cabinet.

The hole back behind the access hole is about the same size as the access hole itself. Just shy of 1/2”…. Maybe 12 or 13 mm. Should there be something in there, maybe a recessed washer or a clip that would let me use a wood screw into the cabinet? I have been unable to get an answer from Samsung.