I just finished installing a new BMV 712 and wired it per the recommendation. I've seen on the forums that the power to the shunt is suppose to be 50mV but the fuse in the supplied red wire is half that.
Here is what my configuration looks like Neg Bat 2 (Right side) to Neg Bat 1 (Left) to Shunt, Load 1,2 and 3 to shunt load side
Anyhow, it's installed in a Winnebago View under the stairs. I had very little room so it looks more complicated then it is. In this photo the display and the power leads are disconnected so I'm sure someone will comment on that, but when its all connected, it doesn't work. If it's suppose to be 25mV then I'm not sure what is bad, the shunt or the display.