Schematics.
YAESU G-650C (azimuth) DB9 connector mounted to connect buttons and variable voltage from rotor potentiometer.
YAESU G-500A (elevation) DB9 connector mounted to connect buttons and variable voltage from rotor potentiometer.
Relais for left, right, up and down.
Potentiometer mounted inside G-500A to reduce voltage output to max 5vdc. (max input for winrotor)
Inside connection of the DB9 connector. On the background you can see the relais interface.
Relais interface.
Calibration and final test with satpc32. Everything works great!