Are you sure? It's sure hard to tell from a photo at that angle with no measurements.
I went to the store and bought a cheap protractor to guide my speaker placement. But f you don't have a protractor handy you can construct a guide in a matter of minutes:
Make a right triangle using a std 8.5X11 piece of paper. The bottom is side a=8.5". Measure 5" up the L side of the paper from the bottom L corner (labelled C) and mark the point at A (that makes side b=5"). Draw a line (labelled c below) from point A down to the R bottom corner at B. Angle A is now exactly 60 degrees.
Then sit in MLP and orient the triangle so side b is the centerline, with point A pointing at you and point C pointing at the spot on the wall right under your CC and 1/2 way between your FR and FL speakers. Place the laser pointer (or simply sight) along side c and have someone place a bit of masking tape on the L wall where line c intersects the wall. That's just about where the L wide should go.
Measure from the front wall back to that spot on the L wall and use that same distance back from the front wall on the R wall for your R wide.