Hi,
I have the same BMS and I dont know about CAN capabilities but the rs485 port that is free is not available on this bms according to https://www.lithiumbatterypcb.com/product/13s-to-20s-li-ion-or-lifepo4-smart-bms-relay-solution/
If you unscrew the aluminium plate on the top, you can unplug...