Need help building a 48V pack from the cells... How many P/S needed?

A to B I don't get you.
That's pack is fine put a BMS on it and run it with your situation how much is shipping ?
Looks like all the sense wires you need at the white connectors that probably won't match a BMS you're going to order remember the first one on the negative is 4 volts the next one is 4 volts and it keeps adding up to you get 48 so be careful with those wires they are live they are part of the battery they're breathing they want to make fire
 
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