To assign an analog input, find a parameter in the configurator that is suitable for it, open the then select desired analog Arduino pin in the [Axis] table.
No entry of additional options is required. The precision (sensitivity) and the dataref value range are pre-defined for each parameter, but can be changed with a conversion if needed.
If you have analog sensors with partial movement range in your cockpit, use the plugin's built-in "Analog Calibration" feature to configure them properly. The corresponding analog inputs must be included in the configuration file, and the plugin must establish connection with the Arduino board first.
After pressing the "Calibrate" button, move all analog sensor handles in your Cockpit in their full range (moving each of them into min/max positions once is enough). After you've done that, press "Finish". Now, the plugin will consider the movement ranges of your analog sensors to be the full range for the purposes of value mapping.
You only need to do this once, as long as the analog sensors remain connected to the same analog inputs, as their calibration data is saved into the plugin's axis configuration file.