Abstract: A connector is inserted moulded into a panel and a fitting adapted to support, or attach an item to the panel interengages the connector. In one embodiment the connector is a plastics socket connector which comprises a hollow boss having a substantially flat end wall and a continuous side wall, a slot in the end wall, a raised membrane of material overyling and closing the slot and a closure shaped and adapted to be press fitted into the hollow boss to close the end of the boss opposite to the end wall. In this embodiment the slot is key-hole-shaped and receives a head of a headed stud.