This Clarion XC-5500 battery cover is missing the clips. Fortunately there is a compartment door next to it with the same ones, allowing a perfect capture. The covers are unique in that they go on the front of the unit and has lettered aluminum trim glued on.
After soaking it in rubbing alcohol for a couple days, the glue was soft enough that gentle prying removed it without any damage. Now it can be glued to a 3D-printed replacement.
Some pics of the original and drawing