Got the wiring done and displays installed tonight and they worked on the first try.
Here are some pics of the console I put them in. It sets on top of my refrigerator. I ran two quick checks. One with a load on the batteries (refrig. running) and one with the charger charging. See below pics. The bridge indicated voltage runs 0.02-0.04 volts less then my Greenlee volt meter, all withing the 1% tolerance specified. Will spend more time with it tomorrow.