Docomo F-02E Arrows X Instruction Manual page 33

b With the arrow printed side of the battery pack label facing
up, align the metal contacts of the battery pack with those
of the terminal, insert in the direction of a to attach in the
direction of b
c Check the orientation of the back cover, and attach it
fitting to the terminal
b
a
d Fit the tabs on the reverse side of the back cover with the
grooves on the terminal, press firmly
Check if there are no gaps in order to maintain
waterproofness/dustproofness, and attach securely.
* "Waterproofness/Dustproofness" P21
31
to close
Before using the terminal