Are they referring to it as a "trip" in the instructions? This sounds like a large (50 - 100amp) breaker. The intention of all breakers is to protect the circuit (wires) not the device (though device protection becomes inherent). Therefore, the breaker should be as close to the batteries as possible. This way, if you burn out a circuit, it's only the 12" between the battery and the breaker, and hopefully the breaker trips before the wire fires.
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