WARNING: This page is about a different car, the 2017 Kia Soul EV. However, it is still accessible from the selected car via links, so may be relevant.
[LH]
Fig 1: Exploded View Of Heater Unit (LH) Components
Courtesy of KIA MOTORS AMERICA, INC.
[RH]
Fig 2: Exploded View Of Heater Unit (RH) Components