on a 9650 there should be a moisture sensor mounted on the outside of the clean grain elevator, and a small green box at the top front of the elevator head where the mass flow sensor is. There was a code at the time for Greenstar Ready minus the sensors, so while the plugs in the cab don't necessarily mean it has all the components, if they're pulled down where you can get at 'em they probably are (no other reason to have them flopping by the cornerpost instead of up in the headliner). If it doesn't have the components, never fear, there's a bundle available through Deere wholegoods.
Those had the old-style moisture sensor that wasn't quite as accurate, but they were a pile more reliable (in wheat, anyhow).