One end goes to +5V (LCD pin 2), the other end goes to Ground (LCD pin 1), and the center terminal goes to LCD pin 3. Your potentiometer may physically look different but the connections are the same as those in the tutorial photographs.
Don
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Alright so i did this and followed a tutorial but its still just lighting up as a blue screen. I think the problem is that the contrast is not working. ARRRGGHHHH! I'm frustrated, thank you for your help. Is there any pictures i could post that would be helpful?