[EdZ]

I’m a left-sided golfer, but I never hesitate to think in right-sided terms if my left-sided thoughts aren’t working.
For example, if I can’t get the correct hip turn going back by thinking “turn the Left hip”, I’ll think “pull the right hip out of the way”. The same sort of thing often applies with the shoulders on the forward swing. My preferred thought is “move the left shoulder up and the left hip around.” But if that doesn’t seem to be working, I’ll try "move the right shoulder down and the right hip around.”
So long as the desired effect is achieved, I don’t think it matters at all which side you think about. In fact, it’s probably good to switch patterns occasionally, for the sake of striking a balance. Thinking one side or the other all the time can easily lead to exaggeration of a particular move.
Jack Nicklaus 1974

A swinger who fails to turn well can get great benefits by thinking of "hitting the ball with the back of the left shoulder" - as if you were breaking down a door with your left shoulder. A very good key to complete your backswing, a move which can overcome some errors in the backswing and allow for a proper on plane downswing. IMO - swinger - back of left shoulder - hitter - front of right shoulder.