Google Nest WiFi Pro Shelf Hole Cover

A small cover for the hole in the wall behind the wifi router shelf. Just rests in place through gravity, perhaps a better design would have a little clip or something.

Printing

Print with the same material as your shelf

Assembly

Put it over the cables in the shelf. The cables might want to push up a bit on it, but just move them around until it ends up fitting most of the way down. You could try and glue it into place, but I'm not sure how you'd clamp it.