How:
1) Pricing! If you pay $8,000 when you ordered Autopilot + Self-driving option.
2) Activation. You don't know until the software allows an option for Supercharger automatic connection. By the way, there's no report of any Automatic Connection Supercharger as of today, so it's still in future.
What:
You stop and get out of the car at the front door of a hotel where there's a Supercharger station that is a walking distance away in the back. You then choose an option on your phone for your car to autonomously go to a nearest Supercharger and to auto-connect itself to charge then get back to an available parking space in front.