The Kenwood KCT-72is a rear accessory connector for use with the NX-5700/5800 series radios.
The cable is 0.3m long with a Molex 12-pin connector to bare ends and is generally used to provide Ignition Sense, D.C. (200mAh max.), GND, Mic Input, Aux I/O x 2 and/or Extension Speaker Output