Actually it's held on by 6 or 7 screws bonded to the underside of the insert. One of mine broke in the exact same location. I've gotten some screws to try & epoxy to the same location but haven't done so yet.

If you pull the heat shield from under your hood, you can see where all of the screws are located at. Remember though that the windshield squirter nozzles go through both the insert & the hood so they have to be removed as well.

BTW, 2 sided tape will NOT hold down that corner ... I tried.