In interconnecting an electrical wire to a conductive terminal having wire receiving slots therein arranged in intersecting disposition, the wire is indexed to the tool and then to the terminal. The wire is located into the slots, without making connection thereto, by applying a light force transversely thereto by a wire pushing element. The connection is made by forcibly inserting the wires into the slots by the pushing element that is configured with a plurality of intersecting splines or vanes to engage the wires and enter the slots within their boundaries during insertion. Such entering of the slots by the splines on the pushing element provides a uniform force application and a full seating of the wires deeply into the slots along a wire length greater than its diameter such that the wires are deformed and wedged tightly in the bottom of the slots.