I took some initiative and snapped some pics anyways, also made a few gifs.
To clarify, this is part number 19355365 on the Chevy accessories site.
"Premier Soft Roll-Up (with or without GM Sport Bar), for trucks, Short box by Advantage®"
First, the tonneau installed
The lever to latch/release the cover
Releasing the cover
The tonneau cover is too wide to just roll right past the light bar
You have to angle it to pass the light bar
This creates some slack once both sides are past the light bar
Rolled up the slack
There are 2 loops between the bed and rear window of the cab to secure the hooks to
The tonneau secured
Latching the cover
And lastly, this is one of the brackets for the cover. It sticks out a little over 3" from the side of the bed. Curious if the OEM bed extender would swing by 2 of them, or maybe some other brand.
All of this may be overkill, but hopefully it answers some questions. I remember not being able to find much info on it before I finally just took the leap and ordered it, glad I did.