You don't need a splitter.
For Camera and Music you create two partitions (you have to).
Then plug the wireless charger into the other USB Port. Done.
Only issue is some (one) of the Wireless Charging trays require both plugs be plugged in.
You can use a splitter on one side with the Flash Drive and just use Power from the other USB port.
I've done every combination with several different splitters/hubs and every configuration worked.
I got rid of the stupid wireless tray because I hate the phone being tucked under there and I mount my phone on a ProClip that I modified to have wireless charging. So now the 128GB Partitioned Flash drive is in one port and the wireless charging ProClip goes in the other. No splitter or hub needed.
I also have a Cigarette Lighter adapter in the Cubby with a Right Angle adapter and a short lightning cable for passengers with iPhones to charge with.
I don't allow Android owners in my car
