Re: Trying to install battery meter
Those meters pull virtually no power so they can be connected anywhere. For the first one (the three connector one) you can connect to the green wire on one side of the key switch for permanent 48V, the blue wire on the other side of the key switch for the switched connection and any negative behind the dash (usually black wires) for the neutral.
For the other meter (the two wire one) connect the positive (usually a red wire) to either side of the key switch depending on whether you want it to continuously display or only display when the key switch is on. The negative (usually black) connects to a negative as described above.
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