WARNING: This page is about a different car, the 2016 Hyundai Elantra GT and 2015 Hyundai Elantra GT. However, it is still accessible from the selected car via links, so may be relevant.
[LH]
Fig 1: Exploded View Of Driveshaft Components - LH
Courtesy of HYUNDAI MOTOR AMERICA
[RH]
Fig 2: Exploded View Of Driveshaft Components - RH