I have a bedroom wall ~154" wide, and the windows are ~144" wide and not centered on the wall (wider on right side). I want to hang a panel of sheers on both sides, to soften the look and figure I'll butt the curtain rod right up to the side walls. Question is: do I mount the middle bracket centered above the windows or to the wall? I know it's only a few inches difference but this will make me crazy if it's not right. FYI the rod and brackets are bronze-colored. Thanks!