in my car(lexus IS300) im trying to mount it as high as possible, but i can only go so high in the center until the RVM gets in the way. and im not sure if it will affect rear detection.
here is a pic of what im ta;ling about and potential places i was thinking of mounting.
Red is the current spot, blue are spots i was thinking about. except the blue about the current spot is where im worried about rear detection. it is also going to be hardwired as soon as i find a good spot to put it in.