Denso VS-G Series Installation & Maintenance Manual page 101

STEP 4
STEP 5
Remove the dummy connector cap from the battery board.
Dummy connector cap
Connect a new battery (1st one) to the pin from which you have
disconnected the dummy connector cap in Step 4.
New backup battery
Note: Do not disconnect old backup batteries before connecting a
new one to the pin from which the dummy connector cap is removed. If
you do so, the encoder positional data may be lost.
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