The invention relates to a mating enclosure having a flange, wherein the flange has a forward face, a rearward face, and a first outer perimeter, a central opening, wherein the central opening has a second outer perimeter contained within the first outer perimeter, at least one protrusion protruding substantially perpendicularly from the forward face of the flange, wherein the protrusion has an inner surface facing the central opening, an outer surface facing away from the central opening, and a forward surface facing in the same direction as the forward face of the flange, and at least one locking element positioned on the outer surface of the protrusion, wherein the locking element is at rest such that a distance between the outer perimeter of the flange and the locking element is less than a distance between the outer perimeter of the flange and the outer surface of the protrusion.