Sprinter Lithium house battery upgrade using B to B. Need help on how to disconnect c

[Spiveyweston]

I am in the process of upgrading my house batteries to Antigravity V1 100ah batteries. I plan on using a Victron Orion B to B 12 12 30 to charge from the current Mercedes Sprinter charging system.

I am having trouble identifying what to disconnect in my current setup. Does anyone have any thoughts on what / where I should be looking for to make sure I disconnect the correct thing

I am an old boat guy so I understand the theory but exactly what I am looking for is a bit of a mystery

My rv is a 2016 MB Thor Syngery 24tt

Thanks