HKN6250A HKN6250B HKN6250 - Motorola Dual Radio Accessory CableHKN6250A HKN6250B HKN6250 Motorola Dual Radio Accessory Cable The APX Dual Radio Accessory Cable (P N HKN6250_) connects the Primary and Secondary radios to the Audio Combiner and a single speaker. Figure 5 4 shows other connections. Attach the green radio connector end of the cable, to the rear of the Primary Radio (female connector). Securely tighten these two screws. Attach the red radio connector end of the cable, to the rear of the Secondary