I just finished running USB cable through the rear hatch via the grommet. It was suspiciously easy to do compared to the CT200h - very flexible shape and easy to "fish" through. When putting the grommet back into its hole I get the audible click, but I get the sense that it's not putting enough pressure on the hole to make it water-tight. For those who did this: Did you tuck any of that surrounding rubber into the hole? I just don't want to end up with water in my headliner. Ask me how I know. -