Hello. New here from the USA. Just purchased a 20 year old sailboat with an Outback power inverter and charge controller paired with a battery bank consisting of four Lifeline 210 AGM batteries in parallel. The house bank is wired a little bit different for me in that the negative connection from the first and the last battery are going to the same lug on a 4 lug Cruising Equipment shunt which I would like to replace with a Victron smart shunt or Lynx Shunt. I assume one of the negative connections would be deleted in this process but I cannot find any manuals for the Cruising Equipment shunt to figure out why it is wired the way it is. I really do not like the Outback Power Mate display and want to eventually go with the Cerbo and 5" display. Any info appreciated please.