this might be a personal preference. but have the usb part coming out of the back of the head unit. and into your glovebox or whatever.
my pioneer deh-4150ub one is like this. means that things like ipods are hidden from sight, if you leave the car. also looks alot neater tbh.
if you wanna go all out. line the rear of the ute with subs and speakers with a tv screen on a hard lid. so you open it up to a full entertainment unit=P
then it defeats the purpose of having a ute.