Install the roof antenna to the roof panel.
Tightening torque (Nut)
4 ~ 8 N.m (0.4 ~ 0.8 Kg.m, 2.9 ~ 5.8 lb-ft)
Reconnect the cable and connector to the roof antenna.
Install the rear roof trim.
Make sure the speaker connectors are plugged in properly.
Check the audio system.