The mounting for the magnetic push latch, like the one shown on the picture. Was designed because the original one was damaged, while the push latch mechanism itself was still intact.

See the pictures attached to get a clue how it is supposed to be mounted. Versions history:
11_1_1 Original Version
11_1_2 Released the back wall
11_1_3 Added the stiffener
11_1_4 Moved the back wall 2 mm backward
11_1_5 Extended the first hole for the latch to align with the surface