I’m sorry if this has been asked and answered. I have an AC200PL and two B300K batteries. The batteries came with a connection cable but they don’t connect to the AC200PL - just to each other. The user manual shows an optional cable with “B210P Expansion Cable” as the description. Amazon has a battery expansion cable called " BLUETTI P090A Battery Expansion Cable". Is that the cable I need to connect the power station to the first battery?