Button under steering wheel. Not sure what to do.

I noticed a couple of months ago that there's a button on the driver side under my steering wheel but didn't know about it until I accidentally bumped it and felt something come undone. I looked and it slid off it's clip and I can't seem to get it clipped back into it's base. It's been hanging over my emergency brake pedal and I'm afraid that I might snap the cords if I ever have to use my emergency brake pedal. How do I go about this?