Honda HSM1380i Owner's Manual page 94

Battery removal/installation
If the battery terminals are contaminated or corroded, remove the
battery and clean the terminals.
1. Turn the engine switch to the OFF position and remove the key.
2. Pulling the rear cover back and up for remove, after loosen the 2
knobs.
KNOBS
REAR COVER
PROJECTION
GROMMET
PROJECTION
GROMMET
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