What is this?

Trying again with photos

We recently took delivery of our motorhome. One of my tasks has been to identify to what equipment the miscellaneous parts left for us belong. I am stumped on the item in the attached photos. I looked through all the manuals provided but have not been able to determine to what this item belongs. My first thought was to the clothes washer or generator but I could not find evidence that it belongs to one of those pieces of equipment. Any ideas?