8
There are threaded inserts in the bottom of the worksurface that
align with the slots in the top of the Keyboard Tray Case (item 7).
Place the Keyboard Tray Case against the bottom of the worksurface.
Align the slots and the inserts. And attach with 1/4-20x .625 PPH
Screws and flat washers (Items F and G).
SMS S5 Keyboard Tray Installation