dual head shower placement ?

hello, again

i am installing a moen 3330 valve. it has a built in bypass. i am going to run both outlets up to the normal area. i am wondering, if anyone has any experience/opinions on the placement of the pipe ends ?

the head system we use now, has a valve on it. but my wife is disabled, and often has a very hard time switching it, when i forget to
thats why the 3330 valve = the handle is down low.

i put them side by side, about 6" apart. search my name for a pic.