So, if I have the "add-on" 7 module's thought out correctly, the setup would look like the connections in the photo below. My bus bars would now connect 4 terminals & two on each end, where my 7 module pack now connects two and there is a single one on each end.
However, how would the ZEVA "view" the cells now that there are 28 individual cells?
Maybe I need to look at the ZEVA documentation again.