The government auction Trail Boss story continues …

As I was working to access the carburetor (to clean it), I saw this tucked under the fuel tank:

If you can’t make it out from the photo, one end of this tube is fastened to the top of the cylinder and the other end is … well … just swinging in the breeze. The clamp is in place, but it’s not connected to anything.

Any ideas where this unconnected end is supposed to go?

Thanks in advance for any insights