I cant help with specific mounting location an Artic Fox but might pass on thoughts to consider for height.
I recently mounted cameras on both truck and camper. Truck is above license plate @3' from ground. Camper is 9'+ unmounted.
With both adjusted to see bumpers, on truck I can see across the street or better rearward, camper I can see about 12-15' (unmounted, should improve once on truck). But its the relative width closest to vehicle (bottom of screen), that changes the most.
From camper, field of vision at bottom screen or closest to camper is about 6' width. Truck, the portion of bumper shown (bottom of screen) is only about 12" width. Mostly because of the fish-eye lens but closer object is to camera the more it fills up screen. The lower the camera greater the distance rearward but also the greater the difference in what you see in screen between top and bottom.
Truck is hard to judge distance because as view further back the distance is more compressed, closer you get to something it fills up screen. Car is about 4 1/2' away end of drive is 40', width from 12" to 100'. Camper, though you cant see as far rearward, the distance isn't skewed and field of vision/width doesn't decrease. I could back up to brick wall and not hit it. Truck I lose perspective-great for hitching but in general needs to be higher.
All depends on what you want to see. Ideally placement would be with live camera to verify what you'll see. Not sure mounted under bumper field of vision would include width wanted?