OPC2523L 12Icom OPC2384 12 to 8-pin Adapter Cable Model: OPC2384 For each HM195 that is going to be connected to an M605 they will also need 1 OPC2384. The OPC1540 that comes with the command mic will connect to the OPC2384 Without the OPC2384 the command mic cannot be connected to the M605