Honda Civic Service Manual: Battery System

Electrical

...

Battery Removal and Installation

Removal 1. Battery Terminal - Disconnection 1. Make sure the ignition switch is in LOCK (0). ...

See also:

Honda Civic Service Manual. Trunk Lid Lock Cylinder Removal and Installation (2-door DX models except KC models)
823110 Removal 1. Trunk Lid Lock Cylinder 1. Disconnect the cylinder rod (A). 2. Remove the bolts (B). ...