Glad you found it. You could cut out the hook pin 6, and route speaker audio out to RG-6.
Or use the 1/8 audio plug on the back of the radio to route audio to your dB9 cable. mic ----------- dB-9 pin 1-----------pin 7 - switched B+ 12volt .5 amp pin 3-----------pin 3 - PTT pin 4-----------pin 6 - ground pin 5-----------pin 1 - mic hi 1/8 speaker--pin 5 - speaker audio The switched B+ is fused on pin 1 and can power the OT2, and a probably a low draw GPS without popping the fuse.
