Denso RC7M Manual page 113

Step 6 Set the new memory backup battery ready for use in Step 2 on the battery cover.
Connect the backup battery harness to the controller.
Step 7
Mount the battery cover with the new backup battery into the controller and secure
Step 8
the cover with the screw.
Caution Take care not to pinch the battery lead wires between covers or
internal parts. Shorting may occur, resulting in an unexpected
failure.
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