Hi Fran & all   In none satellite mode use: Main mini din for  tx audio and ptt (same for 1k2 and 9k6 ) and the sub mini din for rx (this can be configer for 1k2 or 9k6 baud) (ground from both to sheld the signal)   If u want to use main band only (eg in ISS ie1k2 ) disconnect the sub and supply the audio to PC from headphone jake.   Also you can use ACC  where you can reprogram the pins  from the menu.   More easy ! built a distributing box with all terminal to play with.   73 de Nader st2nh