So I have the True battery isolator kit and am installing it, they sent wiring diagram for the batteries and the isolator but not how to wire in the dual voltmeters. I've been on the interweb and haven't had much luck and have also surfed this forum. I get they just essentially hook up to the battery and read the volts but don't you have to break the circuit so they are not on all the time? They sent a relay but cant figure out how to use it to turn on and off both voltmeters to read each battery separately. Any help or drawing would be appreciated.