what's the little round thing on the left side of the glove compartment?

I'm guessing there is a bolt behind it, but what does it hold in?

thanks

if you were able to turn off the passenger side airbag there would be a light there that would turn on when the air bag was off. this feature is not available in the states

here (http://www.rx8club.com/showthread.php?s=&postid=25529&highlight=hercs+button#post25529) is a pic.

thanks for the info!