Help! I accidentally ordered 6-wire Nema 17’s. I looked up a wiring diagram and omitted the O wires. I was hoping the center taps did not need to be used. I have it wired like a 4-wire and it just vibrates not rotating at all. I flipped the orientation around on my Ramps and it does the same thing. Do I need to connect the center tap to the + or -? Any suggestions would be appreciated. Thanks!