A support arrangement within a retail environment. The arrangement includes a unit that includes a casing with a flat rear side, at least three recesses arranged in a pattern are formed in the rear side. The recesses are shaped such that a shoulder extends around at least a section of the recess in the rear side. The arrangement includes a support device including a flat support body to be secured to a wall and a shelf or a support structure. The support device includes a corresponding number of attachment protrusions that have shape and dimension corresponding to the recesses and each including a support surface to bear against the shoulder of the recesses to maintain the unit attached. The arrangement includes a releasable locking device arranged to maintain the support surfaces in contact with the shoulders in the recesses. The locking device has a male/female configuration.