Holes

There's a bit of an unexpected business in making internal structures to hold board game bits in the box more efficiently (or more protectively, often both).  I made up this one for Viticulture because having bought a small expansion it no longer fitted in the original box, but now does.

However, if this is the bit left over, and the holes in this are (OK, were) the product, are the holes holes or is the bit that isn't holes, the hole?