Very sorry to see this happen to you. I was just looking at the structure of your camper compared to my S&S and wanted to point out some differences.

Your camper has a 3/4" aluminum square channel attaching the side wall and the underside of the camper together. The two plywood panels are never attached to each other. This just doesn't look like a structurally sound practice of joining the two pieces together.

Here is how my S&S TC is assembled in the same area. There is a 2x3" single length of wood for the whole side of the TC serving both front and rear tie downs that the TC side wall comes down over and screws into both the 2x3" and the plywood tub over the truck bed sidewall. The piece over the truck side wall is also screwed down into the 2x3" making a very very strong connection. You can see on the inboard side of the TC, there is also a 2x2" connecting the TC together in the same manor. If your rig is repairable, I would strongly look at trying to retrofit a connection similar to mine on your TC and anybody else who doesn't have similar reinforcement of such a vital connection point as this on their TC should look into doing a similar retrofit too.
My camper has been slammed hard enough three times where the hooks on the turnbuckles have bent out and released but the tie downs show no sign of having ever been stressed. My left side tie down is hard to spot but you can see the outboard side where the 7 pin plug is and a black plastic zip tie looped through it. This is also my weakest tie down as the tie down is located in the bottom center of my propane compartment with only about 6" of front sidewall and the jack bracket holding everything together. Other side similar with fridge compartment opening and 8" sidewall in front and jack mount.
This is my TC front right side.

I wish you well and that you folks will be on the road again in no time.