SivviStyle

I bought GCII:DL GotY Edition, and I'm pretty sure I got no serial key with it. I sent an e-mail to support and got an auto-response, so that ball is rolling. Just in case though, where exactly should the serial key be on my version? It's always possible I'm missing it, but it's supposed to be on the "back of the jewel case" which is clearly impossible since the game does not come in a jewel case (it comes in a black plastic case with a small spindle inside).