Other than the three points for the door surrounds' bolts, there is a class 10.9 bolt on the top of the corner where the roll cage and "cross bar" meet at the back that you can use.
The more I thought about it, the more complications came up if you want to keep the door surrounds on around the strength of their captive nuts and not crushing the plastic so I suggest removing the door surrounds, using strong custom made brackets that clear the door frames and class 8.8 bolts and nuts with strong washers.
I have heard that of people breaking loose the welded-on captive nut on the top of the B-pillar with too much force so take care if you're going to use that point.
Don't underestimate how strong the bolts and especially the brackets need to be to withstand the levering force of an open awning in strong wind.
And in case you were thinking of something like the Dune Quickstop "awning" - don't. It's a massive PIA to put up and flaps around like a poli's mouth in the slightest breeze.
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The average human walks 1,500km per year and drinks 83L of beer which means we're getting 18km/L.
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