I put in the front panel of the cabinet upside down. The screws it uses are some kind of cam locks, but the locks are attached to the drawer face and were not put in by me. I've not really seen them used before and I can't find any help online. I need to know how to take it apart so I can fix it!
I have had and solved this problem. There are three wood dowels on each side between those cam lock screws. You must cut them. When you do, you will be able to tilt the side piece in order to extract the screws. I did not feel like getting out my multittool for such a small job, so I used a sharp bread knife. The dowels are not even 1/4" so you will have no problem. To reassemble, I would recommend that you first insert blind nails into each dowel for stability. I suppose you could also try drilling out the dowels and replacing them, but that seems like overkill.
According to the IKEA instructions here, that side piece gets inserted then the cam lock thing is turned clockwise to lock it in place. I assume that removal would be the reverse - turn the screw counterclockwise. Start trying to pull it apart as you turn because the assembler may not have turned it all the way.