Wow, I didn't realize the Leaf pack was so heavy...
You can get some more details on the various assembly bits here:
CustomProducts/EDI/EnerdelBattery - Elithion.
I just got the cells, compression bars, shims, nuts and bus bar covers only, so no end plates or bolts, which is fine as I am making my own module sizes to fit by battery boxes. I like that I can just assemble them any way I want, but the pieces common to any pack configuration are already provided.