Inserts for use in fabricating modular jack connectors. The inserts include conductors having a rectangular cross section. A first insert includes a plurality of groups of conductive leads that extend across a top wall in first and second common planes toward a front end. A first group of leads form a terminal edge by extending toward the rear end of the first insert in a first common oblique plane. A second group extends angularly toward the front end from the second common plane in a second common oblique plane to form a second terminal edge which extends beyond the first terminal edge. A third group may be provided that extend across portions of the top wall in both the first and second common planes. The first and second oblique planes intersect to form a first contact area. A second insert includes a plurality of groups of conductive leads that extend across a top wall in third and fourth common planes. A third group forms a terminal edge by extending toward the rear end of the second insert in a third common oblique plane. A fourth group extends angularly from the fourth common plane toward the front end in a fourth common oblique plane to form a fourth terminal edge which extends beyond the third terminal edge. The third and fourth oblique planes intersect to form a second contact area.