There is another solution. Use the 3m "dual lock". It is used elsewhere on the car.
The black dual lock is good for 200+ deg F, and I have used it in aircraft applications where it had held up for 10+ years with no failures.
Unlike the 3m foam tape, UHB, or VHB PSA's, can be peeled off without leaving a residue.
Follow the instructions. Requires a minute of firm pressure, and 24 hrs before you can load it or unlock it.
This will allow you to remove the plate and frame occasionally to check the dual lock bond and for cleaning, or to reposition the plate.
The black dual lock now available at Lowe's and HD.