The factory mounted the cameras based on what was handy for them and what was expected by, not proven by, the public.
You won't get wash out, you'll get flare if its mounted where any light can get a splash into the lens.
Personally, I've had a rear view camera since crt days.
I PREFER a camera either at the height of/in-line with the monitor or at my eye height directly in-line with my head in the drivers seat.
It allows me to not have to do the millisecond spacial conversion from camera placement to eye level to where I am in relation to the view. Its milliseconds, but its valuable to me. Think race car driver, think the mobile chicane an rv is in traffic, think avoidance.
Get it all working then use blue tape to mount the camera in various places until it's in the place you like hest. Deciding to center it due to convention is maybe not the best choice.