An apparatus including top and bottom portions that when mated form a connector. The top portion includes a top connector portion including a first wall, a second wall opposite the first wall, a first top cap connecting the first and second walls, and wherein the first wall comprises a first concave/convex feature for interlocking. The bottom portion includes a bottom connector portion configured to mate with the top connector portion to form the connector. The bottom connector portion includes a third wall, a fourth wall opposite the third wall, a first bottom connecting the third wall and the fourth wall, and wherein the third wall includes a second concave/convex feature for interlocking with the first concave/convex feature, wherein the second concave/convex feature is oriented opposite the first concave/convex feature.