EXFO FG-750 - Manual (Page 55)

Getting Started with Your Fiber Guardian
Fiber Guardian 41
Working with the Fiber (Patchcord) Management Tray
6d. Position the protective window vertically, and push it slightly so
that the slot on each side of the window rests on the
corresponding pin on the tray.
Your fiber management tray is now installed properly. You will simply need
to slide the fibers into the fiber management clips when you are ready to
use the tray.
Pin located on the fixed
part of the tray
Slot located on the side
of the protective window