Abstract: A connector for installation in a C-shaped track to support a lamp onto the track and make electrical connection between the lamp and conductors within the track, including a connector housing with a narrow head which fits through a slot in the track, so that when the connector is turned the head locks into the track and a pair of contact elements are then pressed against the conductors of the track. A knob on the base of the connector housing, is automatically depressed, to retract the contact elements, prior to the connector turning to its locked-in position. When the connector becomes fully turned, the knob springs up into the slot of the track and thereby causes the contact elements to move out and against the conductors of the track.