"Maybe this is a dumb question, but I have never assembled a gas grill before. I just bought a new gas grill. There is a chain with a long wire at the end with a loop on each end. It is attached with a screw to the outside of the grill & then runs up the side and the wire & excess chain are laying in the bottom of the grill. This part is not pictured or mentioned anywhere in the manual. Just wondering what it's for & where it needs to be."