Ensure the two small plastic latches are oriented on the bottom and right side.

Fit battery door into the two calculator housing slots. Once placed, the battery door should lay flush with the surrounding green housing.

Ensure the screw hole on the left hand side aligns with the screw hole on the battery compartment housing.

Using the #0 Phillips screwdriver, insert the screw.

Rotate screwdriver clockwise until secure.

Note: Do not over tighten, this may crack the plastic battery door housing or otherwise break device.