WARNING: This page is about a different car, the 2012 Hyundai Veloster. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying AVN (A/V & Navigation) Head Unit Connector Terminals End View (1 Of 2)
Courtesy of HYUN
Fig 2: Identifying AVN (A/V & Navigation) Head Unit Connector Terminals End View (2 Of 2)
Courtesy of HYUN
Fig 3: Identifying External Amplifier Connector Terminals End View
Courtesy of HYUN
Fig 4: Identifying Roof Antenna Connector Terminals End View (GPS)