Until you get a more definitive answer you might take a look at the frame photos in this
Here Until There blog post about an ARB awning.
Those folks have a 2015 Hawk and the photos were apparently sent to them by FWC when they had a framing question.
I imagine the photos were sent as representative of the frame, not exact documentation of it as frames can vary according to options ordered. Still, you wouldn't think the front wall would change very often.
That reminds me of looking for studs in the front wall of my 01 from the outside. I wanted to add rubber bumpers as they weren't included at the time.
After removing the trim at the bottom of the wall, I found I could run a stiff wire up behind the siding to "look around". I bent the top and bottom of the wire over and parallel (about 3/8" on top, an inch on bottom) so as I slid it up from the bottom, I could try twisting it. And of course it wouldn't twist until the top went above the bottom horizontal frame member. And that told me how high it was. Locating the studs was kind of the same idea-- insert at a likely area, push up past horizontal-member height, and try twisting.
The technique worked for me but the wall of mine has fiberglass insulation and newer ones have styrofoam. Also, the trim on mine didn't have butyl tape behind it so removing and replacing the trim was super simple. And siding wasn't so tight against the frame that I couldn't insert the wire.
The big disadvantage of this technique is the camper has to be off the truck.
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