I'm doing a knocker kit install on my Houdini, which has the new power supply. I hooked up the 4 pin connector to the DRV-5 on the Add on board, but confused if I need to worry about doing this 48V power supply wire to VIN 2? Or, is this not necessary being that I have the newer hard drive/power supply (not the original one that im told was brown box in color)? Any help is appreciated!