Breather or PCV?

I don't know, thats why I was asking :D Originally I had 2 on the passenger and one on the driver. Driver side was the PCV, and the passenger had the breather in the back, oil cap in the front. My Edelbrock ones only have one on each side, what should I do? Just get a breather cap for the oil fill and pop the breather when I put new oil in?