I have one question. How about all naviagtion buttons? Did you integrated with computer so they can act like mouse and keyboard? or Simply just non functional button?
I am going to install car pc soon and I will integrate those button with car pc.
I have an idea but I am not sure it will work.
To do that buy usb hid programmable module and reassign your button to your keyboard button.
I might need more research on thos part.