Each knuckle is molded in and/or around a coupling structure that is either welded to or is an integral part of the section. The coupling structure can be a bracket that is welded to an inner surface of a section, and the bracket is constructed to have a cross-section that minimizes capacitance. In one embodiment, a first bracket can be welded to a first conductive section, and a second bracket can be welded to a second conductive section. A knuckle constructed from an insulating material that is overmolded within and around the first and second brackets such that the first and second conductive sections are coupled together. The first and second conductive sections and their respective brackets are spaced a predetermined distanced apart, thereby ensuring the conductive sections are electrically isolated.