I'm deleting my snarky response....
The binding posts are a different design from what is shown in the manual. You probably want a flat washer above the top insulator and below the bottom insulator. The top one you will want to make sure that you have electrical connectivity to the post when using spades or bare wire. The one below just to be a flat surface to tighen the nut. You probably don't need all the lockwashers, and one nut should suffice.