A connection assembly may include: a support including an opening, in particular a panel element including an opening, the opening extending substantially in a plane; an electrical connector housing; and an assembly for assembling the connector housing to the support, the assembly being arranged firstly to enable the housing to be held relative to the support in a rest position in which the housing extends at least in part through the opening in the support, and secondly to enable the connector housing to move relative to the rest position, at least in a direction parallel to the plane of the opening, the assembly including at least one resilient return member arranged to be capable of deforming elastically to accompany movement of the connector housing in a direction parallel to the plane of the opening and to return the connector housing to the rest position.