Abstract: A panel mounting electrical coupling connector element comprising a housing (7) in which are supported a plurality of mateable contact elements (9, 10) whose rear ends terminate in insulation-penetrating slotted blades (12, 13 and 14) that are respectively located in wire-guide channels at the rear of the housing (7). The connector includes a hinged clamp (17) arranged such that when insulated wires (25, 26 and 27) are laid in respective wire-guide channels and the hinged clamp is closed, protuberances on the hinged clamp urge the insulated wires into the slots of the slotted blades thereby making electrical contact between the conductor of the wires and the mateable contact elements.