He is positioned the way he is due to the “slatted” design of the humvee grill. Because of that, you’d either have to have them down there or up on the actual hood. You don’t want a human shield squirming on the hood because the humvee sight lines are already bad so if you were the kind of war criminal that’s also practical, this would be where you would put them.
The rest of your questions are horrific. This one is too, but at least there’s an answer.