Rough-in for bath has a 2in drain for the sink(vented), a 4in pipe in the floor 12in from the wall for the toilet and another 4in line 3ft from the back wall and 7ft from another wall. The 2in pipe has a T going over to the vicinity of the 2nd 4in pipe, down into the floor. #1 is the 2nd 4in line for the shower drain? #2 if so, do I need to move it as it is not located in the center of the shower base? Or do I need to dig up the floor to reposition it. There is a cleanout near all of this but out of the way