how to direct a wave maker powerhead ?

I have 3 powerheads in my 30 gallon tank
2 of them directed to the water surface ,
and one wave maker powerhead
i put it in the center of the right ride of the tank ( exactly in the center point of the side )

i want to ask how to direct it ,facing it little downwards or upwards ,right or left or direct it to the center of the opposite side of the tank ?
while i having anemones and i know that they are affected by direction of water current .
(Rose Bubble Tip Anemone + sebae anemone)

 

Set the wavemaker so it moves water where the lightest flow is.