poorkid

I got an old quantum baitcaster from my cousin. It surprisingly works very well even though it looks over 10 years old. The only problem is that it squeaks a lot and I want to open it up and lube it, but I don't know how to open it. It has a button on the bottom that I pressed, but it doesn't do anything. I tried to press it and turn the side plate but it won't budge, could be stuck. It looks like a pretty old model, because I can't find anything about it. On the side it says AC40IC, 4 bearings, 5.1:1 gear ratio. http://imgur.com/ye8tJ0R http://imgur.com/8oOpSYh