A connector assembly has a plurality of electrical circuit members and interposer frames with resilient contact members pressed together by a centrally located actuation screw. The actuation screw is supported within a threaded hole in an actuation bar on one side of one of the circuit members. Turning the actuation screw in its threaded hole causes various parts of the connector assembly to be pressed together simultaneously under an evenly distributed load. A load distribution plate located between the actuation screw and the nearest circuit member reduces the bending stresses in that circuit member. Alignment bushings and pins extending through openings in the circuit members maintain the various parts of the assembly in proper alignment while the actuation screw is being turned.