Over cab rack

Has anyone mounted this style “contractor rack” on their trucks?
Have this model in the box still, bought for a different truck and I’d like to use it on the tundra instead.Unfortunately noticed this morning there’s no lip on the box due to the rails.
I’m fine with drilling and bolting if needed…or maybe there’s a plug style anchor point for the holes in each corner of the box…kind of like how you’d attach a headache rack.

https://www.princessauto.com/en/1000-lb-contractor-steel-truck-rack/product/PA0008888950