Note
Insert the camera unit in an oblique direction in the order of 1 to 2 keeping away from the duct of the housing.
mark
1
2 
Duct
8. Make the camera unit in horizontal position and push it straight up closely to the housing.
Cross sectional view of the housing
Camera unit
Push the camera unit straight up closely to the housing.
Screw section
inside of the
housing
is to be inserted into the oval hole 
in t
he camera unit.
23