Basically as far as I know it's the VV mod but you add in the indicator between the power out the switch (probably hook pin 2 on indicator to the + just after the switch and pin 1 to the ground..or run 2 wires off the switch one to the connector one to pin 2 on the indicator then from pin 1 to the connector) and the connector and you put everything in the center instead of the side (not sure if you need a resistor)..http://www.madvapes.com/How-to-build-a-Variable-Volt-Box-Mod-_b_37.html..look at the pics of the VV indicator mod and the how to I linked..go to the Modding Forum for more help...
Edit: If you wanted to get real fancy you could put in another button and run a wire from the battery + terminal into a switch to another pin on the indicator and when you push the button it would show the battery voltage..this way pin 1 would have to be on the ground wire on the other side of the connector..pins 2-6 on a indicator are all + for testing separate batteries...
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