Connector assemblies for electrical components include a base frame having opposing side walls and opposed pairs of interior walls which are disposed parallel to the side walls. The interior walls define a mounting hole which is sized and configured to receive an individual one of the holders. The interior walls are interiorly spaced from their respective side walls so as to establish a relief slot therebetween. The side walls of the base frame are provided with vertically separated locking tabs and mounting flanges. During mounting of the connector assembly to the supporting structure, the locking tabs will be inwardly resiliently displaced until such time that they each clear the edge which defines the mounting space in the supporting structure for the connector assembly. At that time, the locking tabs will resiliently return to their "normal" condition. As a result, the supporting structure will be lockably positioned between the vertically separated locking tabs and mounting flanges.