Back in post 210, Powell showed how he is using a couple of the NiMH battery sense boards with lithium button cells to get the BMS board to work with his lithium conversion. I had overlooked this detail when I tested an E+ LiPo BMS board that I am trying to salvage, and I think that is why the test failed. I would like to try the same trick with proxy batteries, but the cell sensing setup is a bit different. There was a lead connected to the positive terminal of each cell, but unlike the hub BMS, there are no individual negative connections. They are the ten connectors in the bottom half of the photo below.

E+ LiPo BMS board
Since I know only enough electronics to be dangerous, and actually understand less, I'm hoping someone may recognize this kind of BMS configuration and be able to offer a more informed opinion on this question: Is it reasonable to assume that one could fool the BMS into thinking the original batteries were present and in good health by connecting the positive of a ~3.7V power source to one of the sense terminals, and the negative of the same power source to the negative 36V side of the whole system?