The front portion of the roof is boxed for strength and the rivnut heads will just fall in and stay forever. Same as with the roof rack mounts. You could possibly fish them out but I just left mine in. I tried to drill mine out but the rivnuts would just spin, I had to use a grinder and they were out in a hurry, a cutoff wheel would work if the heads are raised like yours are. Now looking a bit longer at yours, those MAY be far enough back to be accessible from the headliner.