Hi, I'm using the Orion-TR 12/12 non-isolated in my VW T6.1 without any problem. However, in order to charge all the three original batteries with the build in mains charger in need either to restore the original wiring (since no current will flow via the Orion from the output to the input, reverse direction), or just connect the input of the Orion to the output (i.e shorting input to output). Is this acceptable for the Orion non-isolated 12/12 charger?