You need to disconnect the G5 from the canbus and connect a wire from the reverse light to G5 for reverse detection
Renault Megane 3 (2008-2014) cable and canbus
You will need to modify the speaker outputs to be unamplified in order to prevent speaker buzzing/humming sounds
Please see the guide for it here
We have provided a few examples below
Skoda Octavia 2 A5 (2008-2013) Size:Octavia 2 CC4P 128G You need to disconnect theSPECIFICATIONS Android Auto: Support Brand Name: T'EYES Carplay: Support Certification: CE,EAC Digital Media Format: Mp3,MP4,WMA,JPEG Din: One Din Display Size: 10. 2" For Vehicle Brands Model: Skoda Hign concerned Chemical: None Item Weight: 2 OSD Language: Chinese (Simplified),Chinese (Traditional),Russian,English Operating System: Android Output Type: Colored Special Features: wifi function,Support steering wheel control,Support Can Bus,Built in