An electrical connector is provided for terminating a flat electrical circuit. The connector includes a dielectric housing having an opening at a front end thereof for receiving an end of the flat circuit. A plurality of terminals are mounted on the housing in a side-by-side array and spaced laterally along the opening. An actuator is movably mounted for pivotal movement between an open position allowing the flat circuit to be inserted into the opening with substantially zero insertion forces, a closed position biasing the flat circuit against contact portions of the terminals and an intermediate position whereat the flat circuit is tentatively held in stable condition while allowing readjustment thereof.