Carrie R Devoe Litty
Hard to know without seeing the desk. Didn't it come with assembly instructions? Is there a spot on the desk with similar holes?
It came with the desk. It's made out of wood and isn't attached to anything. There's 3 holes on the side which can hold pens, but I don't think that's the reason they are there.
The desk:
The top part is removable as well.