I am picking up my new Reflection 303 tomorrow. Had the Andersen hitch installed yesterday at the dealer on a Blue Ox flip ball, 2017 F350 SB 4x4. The tech was fairly insistent to install the funnel facing forward (towards the truck). In my reading and discussion with JerryR, my concern is when the funnel is forward, the pin box can strike the bed rails. I want to turn the ball funnel rearward towards the trailer. I, and my spotter, can see the corner of trailer approaching the window a heck of a lot easier than I can see the pin box hitting.

Frankly, as a newbie, first drive home to storage, I would like to be at least confident about one decision and not let the tech make me more nervous. Thoughts? Any others with similar set up?
Thanks in advance.