not sure exactly and the stock position is definately higher but only just, but a nice unit mounted to the inside of the glass on the hatch is not a big problem to me. it will do its job and should not be questionable
I did the internal rear window stoplight on my old black beast, with no issues up here in QLD , so long as it is mounted and hardwired in properly it doesn't break adr rules. I had mine mounted down low on the screen with what is called by transport as it eye height level and i used a narva thin strip led type and it worked a treat. https://www.google.com.au/imgres?im...K6QaKWB4y-M:&docid=fGuYZFmruC0EiM&h=500&w=500