WARNING: This page is about a different car, the 2016 RAM 3500 HD and 2016 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Rear Wheelhouse Splash Shield Screws
Courtesy of CHRYSLER GROUP, LLC
Remove the inner screw (1).
Remove the three screws (3) and remove the splash shield (2).