Bms in series to charge 2 6s lipo with 50.4vol

Hello
PLEASE HELP!
I cant find in my place a 12s BMS, but can grab 2 x 6s like the ones in the picture.

The batteries are not really those in the picture, but 20A custom build 18650´s 6s (each pack).

I have a switching power source 50.4V 2.5A (not sure if is cc cv) and 2 bms 6s like in pictures...need to charge 2 lipos 6s in series? (12s in total) Can this diagram be posible?

The balance leads connected in series and both bms also connected in series too... here is the diagram:

yes. it will work but as soon as you get even the slightest inbalance you are hosed as the bms will trigger overvoltage.

defenetly not recomended unless you always keep both batteries hooked up as a pair.