Mercury X3-40 Manual page 16

WIRING AND BATTERY INFORMATION
IMPORTANT: The jumper wire should be the same wire gauge as the
negative (–) and positive (+) power cables.
4. Connect the trolling motor negative (–) lead to the negative (–) terminal on
battery A.
5. Starting with the positive (+) lead, reconnect the battery cables to the
engine starting battery.
d
Battery A
a - Power cables to trolling motor
b - Manual reset circuit breaker
c - Jumper wire (not supplied)
d - Negative (–) battery terminal
c
Battery B
BLK
c
b
12
a
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eng