Just took delivery of a new S3, sn 6-84066. It came with spare traction tires and a coupler for the front, which I understand. It may be a dumb question, but is the U shaped metal piece to extend the tender towards the cab? The other item is a small black box with two screws, almost looks like draft gear pocket but it's not. Thoughts? Thanks. Not mentioned in manual or on line that I could find.
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