I am trying to connect a Multiplus 24/1600/40-16 unit to the BMS on my LiFePO4 battery. The Victron notes on "Connecting other Lithium systems to Multis or Quattros mentions that the Multi or Quattro needs to be of a recent type that has auxiliary inputs. The drawing shows connection to the temp sensor and and an AUX I/0 terminal. I can see the temp sensor connector but can't locate the AUX I/O for the second connection required. Appreciate any assistance here