Extended Rain Gutter Spouts

[k9jkfham]

I have looked for an answer to my problem and did not find one. On my Vista 35F I have the rain gutter spouts on 3 corners. The one above the driver has come off. Today I climbed up to look and cannot figure out how to reinstall a new gutter spout behind the factory rain gutter. Is the rain gutter from the factory installed with screws? I could not find any screws and not sure how one would get a screwdriver under or over the rain guard the way it is built.

Is the factory rain gutter installed with a glue or epoxy?

I sure would like to replace the one rain gutter spout but I am baffled.

I hope someone else has installed or replaced the gutter spouts and can help with some suggestions.