You want to start with them at least 3' from the wall behind and at least 1' off the side wall. I always toed mine at least 6" in with tweeter on the inside. The exact spacing will depend on your listening location. I always used something well recorded like jazz or d2d. If you have someone else who can move the speakers while you listen it makes it easier. I always kept a note page with the measurements of the 3 speaker points from the wall with notes on the sound so I would have something to fall back on.
Good luck
Good luck