What did I do to it ?

I installed the front end gusset plate on my new 15 S900 that just mounts over the lower A arm mounts and now the steering wheel is off center. All that was done was to remove the lower A arm bolts at the frame, set the plate over the mounts and reinstall the bolts. The tires did have to be wiggled a bit to get the arms to realign with the holes in the mount. What did I do to cause the steering wheel to be off center now. No geometry was canged. Could moving the tires around to reposition the holes have affected the power steering somehow?
Help, I want my baby back all perfect like it was.