"IMHO not a good place to put a BMS."
777 and others do the same. Even got a cooling fan.
Considering the number of connections, it is the best place to put it. Logs go to the charger and failsafe battery disconnection is also managed there, I hope.
When cells fail the PCB's (failed to) serve their purpose and are irrelevant after a few minutes of logging.
Do T7 have Li-Ion batteries?