There is a roofwalk support just next to where the lateral(?) roofwalk attaches.
If you zoom in, it seems to me that the hinges are set up so the hatches open lengthwise (toward the end of the car) rather than crosswise (toward the side)
Which then begs the question – what are all those supports outboard of the hatches????
Stabbing in dark… You take the whole running board from the center of the car, place it on the supports outboard the hatches, then you can open the hatches?