A connector assembly, comprising: - a support panel comprising: first and second opposing faces; and a mounting aperture opening into each of said surfaces; and - a connector, comprising a flange and a mounting member, said mounting member comprising at least a first mounting element; said connector being adapted to be mounted to the support panel in an assembled configuration, wherein the flange contacts the first face of the panel and the first mounting element is inserted into the mounting aperture; wherein - the mounting aperture comprises an insertion portion and a blocking portion, aligned in a direction parallel to the support panel, the locking portion receiving the first mounting element in an assembled configuration; the insertion portion being configured to allow reversible insertion of the first mounting element by translation perpendicularly to the support panel; said insertion portion being defined by an edge of substantially circular shape; the blocking portion being configured to lock the first mounting member relative to the panel in translation perpendicular to the support panel, said blocking portion having a dimension less than the transverse dimension of the insertion portion perpendicular to the direction of alignment of said portions; and - the assembly further comprises a locking device (20, 120, 220, 320), said device being capable of elastically deforming under the effect of a movement of the first mounting member from the insertion portion to the blocking portion; and of blocking an opposite movement of said first mounting member, the assembly being characterised in that: the first mounting member comprising a shank projecting from a first surface of the flange and a washer disposed at an end of the shank opposite said first surface, a space being provided between said washer and the flange, the washer having a circular outline substantially complementary in shape to the edge of the insertion portion. - a support panel comprising: first and second opposing faces; and a mounting aperture opening into each of said surfaces; and - a connector, comprising a flange and a mounting member, said mounting member comprising at least a first mounting element; said connector being adapted to be mounted to the support panel in an assembled configuration, wherein the flange contacts the first face of the panel and the first mounting element is inserted into the mounting aperture; wherein - the mounting aperture comprises an insertion portion and a blocking portion, aligned in a direction parallel to the support panel, the locking portion receiving the first mounting element in an assembled configuration; the insertion portion being configured to allow reversible insertion of the first mounting element by translation perpendicularly to the support panel; said insertion portion being defined by an edge of substantially circular shape; the blocking portion being configured to lock the first mounting member relative to the panel in translation perpendicular to the support panel, said blocking portion having a dimension less than the transverse dimension of the insertion portion perpendicular to the direction of alignment of said portions; and - the assembly further comprises a locking device (20, 120, 220, 320), said device being capable of elastically deforming under the effect of a movement of the first mounting member from the insertion portion to the blocking portion; and of blocking an opposite movement of said first mounting member, the assembly being characterised in that: