The AUX connector is a standard 78-pin D-sub connector that is made by numerous companies. It can be purchased from Digi-Key in various flavors, solder pin or crimp pin. FLIR uses the crimp version AMP 1658674-1 which requires crimp pins AMP 1658670-2 for 22-28 AWG wire. The required hand crimp tool is AMP 90800-1 and the optional insertion/extraction tool is AMP 91285-1.