so these are only for the surround speakers ?
the "side" speakers should be at 100 to 110 degrees (just off your shoulder) and, if the units have a pivoting tweeter, aimed at the prime listening position. The rears will benefit from the angled baffle, and if they have pivoting tweeters, aim them as well.
I would recommend at four be the same if possible. The angled baffle would work for the "sides" as well...just postion them to direct sound towards the prime listening position.