On the day of your departure, call the car park (+33 601845598) 10 minutes before your arrival at the station. An operator with the MyValetservices2.0 logo will set up a meeting point and come pick up your car after having made a small inspection of your vehicle. (edited)
When you return, call the car park when you get off the train. The same operator will return your car to the same place where you left it.
Route Départementale 9