Disclosed herein is a factory installed wiring guide that guides conductors into position for quality termination and crimp and which provides strain relief (support) for the wires or fibers and the outer sheath of the cable to create a quality cable or sub-cable assembly supporting termination at both ends of the cable. The wiring guide is sized to overcome obstacles and fit into conduits during network wiring installation. The wiring guide may be inserted into a cavity on the backside of a RJ45 female connector, completing the termination of a station cable to a RJ45 female jack. The wiring guide may be installed into a plastic housing creating a RJ45 male connector. The wiring guide may be utilized for multiple connections without damaging or compromising the wiring guide and without the need for cutting the wire from the sub-connector. The wiring guide supports universal attachment to either male or female RJ45 connectors.