gas tank location

Just finished installing the dual exhaust in my Demon. Sitting out back of the car I noticed my recently installed empty gas tank seemed to be about an inch away from the right exhaust pipe and about three inches away from the left exhaust pipe. I have it just loosely installed and have not yet installed the filler pipe. How do I find out if it needs to shift left a couple inches. Is there something it should be centered on? The straps seem to be about in the center of the two raised flat panels and not in the adjacent grooves. Is that where they belong.