Okay.
So I ported your batteries to my system that I wrote.
I just uploaded it to my github :
Note that I cant test this, but the system runs like mine does, only using your Samsung batteries.
So yes, essentially you need the cables and to properly switch the bms boards so that they will send the correct information and use CAN, and then install the repository, and we can test from there.
While I cant be sure of anything since I dont have physical access to the cerbo and batteries, it should work. Worst case we need to ssh into your device and set it up like that remotely.