A thought comes to mind, but not much of one.
MOST bag awnings come with two sets of poles attached to the aluminum end frame of the awining.
Pole #1 (pair) goes to the ground or attaches to some sort of clip on the side of the tub. These are the main support poles. (Tip, don't use the clips on the side of the tub...the job is too demanding. Run these poles vertically, stake them down-D-ring straps-, and use guy ropes at 40 degree angles from the top of the pole to the ground. This will help keep the awning safe if there is a sudden wind.)
Pole #2 (pair) is a "rafter" that goes between the aluminum end frame and a "socket" of some sort at the roofline...where the awning meets the roof. This rafter pole is typically a slide-to-extend, twist-to-lock at the chosen length, and it is usually used to make the awning taught.
What FR seems to have said is that your pole MIGHT be a mid-span support to help prevent sag at the center of the awning. Were this to be true, it's actually a bad idea. The poles listed above both keep the awning taught and support it. In the event of rain, one MUST shorten one of pole #1 to the ground in order to pitch the awining so it drains. A mid-span pole might allow a belly on the upper side of the fabric that could collect a lot of water and not drain properly. This weight could overstress the fabric and frame members.
Since that pole is not structural, I wouldn't use it for that purpose.
ALSO, since FR was unresponsive and seemed to be uncertain about the pole's purpose, I urge you to contact the awning manufacturer...and ask them. Also refer to the awning owner's manual (in the bundle of papers you got with the rig), but given that these manuals can often be somewhat generic, I'd definitely consult with the awning manufacturer. Be sure to get both the model number and serial numer (if available). There should be some sort of "data plate" somewhere on the awning frame. They will have a definitive answer...at least about their awning.
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Jim & Renee
2020 Jayco Jay Feather X-213
previously 2014 Forest River/Rockwood HW 277
2006 Ram 1500 4WD Crew with Firestone Airbags
Every weekend boondocking in the National Forests or at Lake Vallecito.
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