WARNING: This page is about a different car, the 2014 Kia Forte5 and 2014 Kia Forte Koup. However, it is still accessible from the selected car via links, so may be relevant.
Component location:
Control shaft assembly is mounted on the top of the manual transaxle
Fig 1: Identifying Control Shaft Assembly
Courtesy of KIA MOTORS AMERICA, INC.
Function:
Change the gear by shifting a shift lever.