Reply to stupid question, or one you all want to ask.

I bought an NI audio 6 this weekend, and when I opened it, the metal loop on the back that I assumed was for locking the unit to a table turned out to not be a loop. Its a metal J that would be no good for putting a lock on. What is this? I've looked everywhere, and am kinda feeling stupid, as it looks like it is there for a reason. Can someone enlighten me please?
Thanks.