You sure Mike? Just thinking that those holes look awful large for the small screws used in all the carpet/mat hold-downs that I've seen.
And the ones from the factory were at least punched cleanly in the middle of the bar, rather than offset to one side.
My first thought was the reinforcing plate behind the hard top for the lift-gate hinges, but I don't think that has so many holes. And I think those are just short blocks, rather than a long strip?
Then I thought, "hmm, custom made hard top hold down reinforcing plate" for the bed rails, or the top of the windshield frame. But that does not look right for those either.
Paul