Leak

[shooter_va]

I had water coming from the overhead console due to a leaking windshield, glass shop applied some sealant in the areas where there was next to none, that seemed to work.
After another rain, the floor in front is wet, so it must be a leaking luggage carrier as well. Tried to remove the screws to apply some silicone, but the rivnuts are turning with the screw.
Any suggestions on a fix (or are the only two options to either drill out the screws, remove the luggage rack, drill out the rivnuts and re-install everything or silicone around the whole carrier mounts)?