https://wpilib.screenstepslive.com/s...smartdashboard
The example they give adds Commands to the SendableChooser. However, because you are using iterative, you can put a number or a String or an enum or something in place of where it has "new Pickup ()" and "new ElevatorPickup", and then getSelected () will return that numbwr/whatever associated with the selected option, so you can use that in an if statement to decide which Auton you want to run.