Backup camera license plate mount

I installed backup camera on my suburban, and didn't find a good way to mount it, so here is what i came up with, will need 2x m3 heatset inserts and m3 socket head cap screws. I used this camera... https://www.amazon.com/gp/product/B07JL8DGNQ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Will need either abs or petg, pla is probably not good enough...