Am I missing a clip?
 

This is the inside of my trunk lid, there's a hole that looks like should have one of those circular clips over it to hold the trunk liner up... but there's not.

Can anyone else confirm whether there should or should not be anything but an empty hole here?

Ya, I checked, mine is the same way. Seems to be an access hole for the latch, I suppose

Most likely removed to add your spoiler. No big deal though.