Could you please provide instructions as to how to wire a housebank of 3 group 31 batteries in Parallel to the shunt negative? Are all three negative cables wired to the shunt lower sense connections or are the wired to each other and then only one connected to the lower shunt connection, or are two wired to the load shunt connection and one wired to the lower sensing shunt connection? I tried calling Xantrex but gave up, they apparently don't answer phones.