WARNING: This page is about a different car, the 2016 Porsche Macan and 2015 Porsche Macan. However, it is still accessible from the selected car via links, so may be relevant.
Disconnect connector -1-
on the throttle housing and pull cable out of the clip.
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Unscrew and remove screws on the throttle housing.