Front Drive Shaft
WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
The propeller shaft connects into the transfer case pinion with a splines equipped pin which is part of the front drive shaft universal joint. The function of the joint is to handle the difference in angle between pinion and propeller shaft, as well as to be flexible longitudinally.