ETC Source 4WRD Color Installation And User Manual page 13

3. Insert the diffusion into the
reflector housing with the dull
side of the diffusion facing the
lamp and the shiny side facing
out.
4. Ensure that the tabbed corners
are snug under the reflector
bracket wings.
5. Replace and secure the shutter barrel and lens tube.
Source 4WRD Color Installation and User Manual
Tabbed corner fits
under reflector
bracket wings
Insert
diffusion
Shiny side
facing out
9