Honda EU26i Owner's Manual page 54

Installation:
1. Make sure that the engine switch is turned OFF.
2. Connect the battery positive ( ) cable to the battery positive ( )
terminal, then the battery negative ( ) cable to the battery negative
( ) terminal. Tighten the bolts and nuts securely.
3. Install the battery holder band.
4. Install the front cover, and install the four 6 mm cap nuts.
When disconnecting the battery cable, be sure to disconnect at the
battery negative ( ) terminal first. To connect, connect at the positive
( ) terminal first, then at the negative ( ) terminal. Never dis/
connect the battery cable in the reverse order, or it causes a short
circuit when a tool contacts the terminals.
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