how many batteries does it have? 2 12v?
that would have to be the case, all you need to determine is if they are wired series or parallel.
Parallel (pos to pos, neg to neg) means the system is 12v, it just needs the parallel for more amperage across 2 batteries instead of one.
If they are series (pos to neg to pos to neg) then that takes 2 12v batteries and turns the circuit to 24v.
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