Disconnect the negative(-) battery terminal.
Remove the crash pad lower panel (A).
(Refer to BD group - "Crash pad")

Remove the start/stop button cover (A) after loosening the mounting screw.

Disconnect the connector (A).

Remove the start/stop button (A) after loosening the mounting screws.

Install the start/stop button.
Install the start/stop button cover.
Install the crash pad lower panel.