I don't think you read my text, but only look at the drawings.. the wire lengths are not to scale. The R/R is mounted next to the SPG. Does the wire from the SPG to the negative on the battery also need to bee longer for the return current to route where you want? Also, I don't quite see how the R/R will see much of the the return current as it is connected in parallel to the circuit with the other loads and offer more resistance than the return wire between the SPG and the battery (-) . The only way I see see the R/R seeing more current is if I remove this cable but then the voltage it reads will be all over of courseI think the final drawing is a good picture of what goes where. I'll keep wires short and use the right dimensions, and I think this will work fine for a long time
As I have the M-unit blue I will also get a warning on my Bluetooth headset if battery voltage gets to high.
I'm clairvoyant.