WARNING: This page is about a different car, the 2015 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Glow Plug Module
Courtesy of CHRYSLER GROUP, LLC
Install the glow plug module (2) and securely tighten the retaining nut (1).
Connect the Glow Plug Module wire harness connector (3).