CABLE AND HARNESS GENERAL REQUIREMENTS - CABLE AND HARNESS GENERAL REQUIREMENTS (cont.) PREFERRED. CONNECTOR STYLE. Connectors shall be straight, right-angle or flange-mount. The use of right-angle connectors shall be minimized and restricted to applications where stress-free NASA-STD-8739.4 | NASA Technical Standards System (NTSS) The purpose of this NASA Technical Standard is to set forth requirements for interconnecting cable and harness assemblies that connect electrical, electronic or electromechanical components. This standard applies to critical work, as defined by NPD 8730.5.