The negative post is wired to a stud on the frame behind the battery(s) If you have two 12 volt like ours you want the to wire to the negative with all the wires ; this will be on one battery, and all the wires on the positive which will be on the other battery.
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2016 Axis 24.1 E-450 6 spd tranny
300 watts portable solar.
200 watts solar on the roof.
Wrangler JK dinghy
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