A method of manufacturing a wiring harness assembly includes the steps of forming a plurality of electrically conductive wires encased within a substrate formed of a dielectric material, forming an opening in the substrate located and sized such that a section of the plurality of electrically conductive wires is exposed within the opening, disposing a support segment within the opening, securing a connector segment including a plurality of terminals to the support segment, and placing the plurality of terminals in mechanical and electrical contact with the plurality of electrically conductive wires.