Equipment comprising a box (14) having a rear face (15) including a setback (19) that is for releasably receiving a fastening support and that is fitted with a catch (2) that is movable between a position in which it projects into the setback (19) and a retracted position, wherein the catch is secured to a first end of a rod (3) that has a second end (10) visible in the front face (18) of the box and that is mounted in the box (14) to pivot so as to drive the catch (2) between its two positions.