Like often the case with the mobile radios we’re getting the necessary signals from two separate connectors:
Digirig’s audio cable should look like this:
MIC pin 1 (MIC) → 3.5mm TRRS ring1 (RIG_AFIN)
MIC pin 5 (PTT) → 3.5mm TRRS ring2 (PTT)
MIC pin 6 (GND) →
MIC pin 7 (GND) → 3.5mm TRRS sleeve (GND)
3.5mm TRS tip → 3.5mm TRRS tip (RIG_AFOUT)
3.5mm TRS sleeve → 3.5mm TRRS sleeve (GND)
Manual here.