Point one 57 straight at the middle of the speaker, on the grill, and the other 57 at a 45 degree angle pointing at the ring between the center of the dome and the cone. One speaker is enough.
A second option would be one 57 straight a the ring between the dome and the cone, and one 57 straight at the middle of the speaker a meter or 2 back.
XY is not really a great solution for this music because there is very little on-axis pickup. The highs burst out of the center of the speaker straight forward, totally missing the mics in an XY setup.