Assembly & Installation Notes:
The printed image board is to be inserted into the slot first allowing some room to maneuver the plate into the slot.
The cover sheet with the mask pre-applied to it is slid in after the backlight element, the second face insertion ensures access to the slot is possible to make sure that the edge seats properly.
A white or metallic reflective surface should be installed in the back of the box to stop the shadows from the supports from casting and to make sure that the light spreads in the gap properly. The existing opaque white acrylic board with a reflective print attached to it would do this job very well.