What's the best position for Mission M7DS bipole surround speakers in 5.1 system?

Dolby does not have a standard for dipole speakers but THX lucas films does so I would recommend researching the THX standard......sometimes when we have a less than ideal placement option we have to experiment to see what sounds best outside of any standard...so if you can experiment with different placement options... you may have to leave it is one position for a month or two before you become accustom to the sound and its limitations and then try another position for a month experiment with various movies and music you are familiar with until you find the most pleasing effect with the widest amount of movies and music....you may have to adjust settings several times and you may not be able to use the built in analyzer either it may have to be tweaked by ear....and using a sound meter...but just generally speaking the closer the speaker is to any reflective surface the ceiling the side wall the rear wall the greater the risk of harmful reflections but compromises have to be made between what looks best and sounds best and whats practical for our particular room and life style...