MacBook Pro mystery button revealed?

So you know that mystery port we found over the weekend? Well, our tipster just phoned in a lifeline for us. Hate to let you all down but….

It is the battery release button…   :(

Actually to be perfectly clear, he said the battery ejector was on the side.  Technically it could be that little circle thingy (which is on the MacBook as well).  We don’t want to go making assumptions…Anyway, yeah we’re still hoping for something more exciting (dock connector!!!)…