It looks like cover of a transfer case or some sort of gear box.There are a BUNCH of whatever this thing is. Apparently someone else wanted to know what it was, because the paint has been scraped off where an ID label is. However, I searched for those part numbers and still didn't find it.
I went crazy when I saw the barrels and cases at Galaxy’s edge. I researched them a lot and not all are painted. Many where left red and you see them a lot in the movies and shows. I modeled the vents and have the STL for anyone that wants it.
Yes. You also see it in all the space ports a lot.