I tend to be fussy about aiming my Mobius cameras in my vehicle. It pays off in many ways such as avoiding too much sky in the image, thereby improving exposure, providing a level horizon and giving me equal coverage on both sides of my vehicle, especially in the rear as I drive a truck and want equal coverage on either side of the bed.
To aim, I use the supplied wiring harness, a small battery powered 7 inch LCD TV and an external battery bank (because the cameras have capacitors) Works great and worth the trouble.