stupid newbie 45 question

I just bought a used Pro-Ject 2.9 turntable, and picked up some new records at record store day recently, including a couple singles. I figured out how to change the speed, and two of the singles played with no problem. However the third one has a large hole in the middle, so I cannot center it exactly. Am I missing something in how to play this, or is there some accessory piece I need? I tried centering it my best anyway but stopped when it played with a lot of wow.