configuration to connect the two batteries of a 1990 Isuzu Box truck

1990 ISUZU NPR
120,000 MILES
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DRJOEGADD
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Can you please advise the configuration to connect the two batteries of a 1990 Isuzu Box truck? Or what cables go were on the four posts? Thank you
Apr 18, 2013 at 9:05 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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