Hey Phill We can do this just watched your video a shit load of times ,
I think i don't need a hmi box , we just come from under seat (usb) to input side of front double usb , come out from out going side to brown plug on front that feeds the console box , that picture i sent you of my (vais xm) plugged directley under seat works fine. still have car play ,
So i should order those usb cables unless you have them
So i'll just need your power up wireing and the upgrade plug for wireless gharging pad ,