How do I open the case for a Seagate GoFlex?

I have a Seagate GoFlex 2TB drive that, while it worked fine a week ago, not longer mounts. Disk Manager sees it, but says it's unformatted. I think the USB to SATA interface has failed and I got a new one, made by Anker. However, the SATA connector tabs aren't long enough to fit through the case and seat with the SATA connector on the drive. I'd like to open the case and remove the drive, but I can't figure out how. I see no screws holding the case together. Any suggestions?