LVC with 2x 2s lipos on MMM question

[FullMetalGrave]

I plan on running 2x 2s lipos in series on my Maxx once I get my MMM. I've read the posts about ESCs that have two battery inputs and you set up the lvc through the BEC side of the controller but the MMM looks to only have one battery input which is where I would plug in my series adapter. To my understanding, the controller will see 4s and cut off voltage at the correct level.

My concern is what if one battery discharges faster/deeper than the other (for some reason, just a hypothetical at the moment) and one battery remains high enough in voltage to prevent the LVC from kicking in? Is this even something to worry about or will both batts stay close enough together in voltage that when the lvc kicks in I'll be ok. I can't seem to find anything refering to this situation....

Thanks for any help, I dont' want to screw anything up and start ruining batteries left and right