So I now have this weird rattle coming from what appears to be the connection between the top panel and the side panel on the right side (looking at the front).

I had taken the rear panel off several weeks ago to clean everything out, and I checked that first thinking I may not have re-secured it properly. Thankfully, it was tight and secure.

But when I look and listen I can audibly pinpoint it to the side of the dryer, along the seam between the top panel and the side panel, directly in the center of the length of the seam. Is there some sort of clamp there or something? Removing the back panel reveals another full panel, so I can't see this point in the seam easily.

Any thoughts?