Leer 700 long-bed hard top on 3rd Gen Toyota?

Hello everyone,
I bought a used leer 700 hard tonneau long-bed for my 2017 Tacoma sr5 4x4 today and am trying to mount it. The bots provided by the seller are too big. The hold-down cranks just about reach the bottom of the inner stock bed rail. Is the idea to bolt these leer clips into the Toys bedrail boltholes? Or get rid of the side bed rails altogether. I also have the black plastic bed sleeve that runs on the top of my truck bed walls. Should I take those off? It seems like if I get a longer bolt that would do the trick. Trying to look for videos without any luck.

Finally found one for my long bed, I sure hope it's possible to mount this to my truck.
Has anyone put one of these tops on before? I sure could use some advice.
Thanks all,