Help with an engine part
 

Greetings to all!
I recently purchased a 2009 mini clubman s and I had to repair the engine after it burned the head gaskets. I sent the engine tohe machine shop for rectification and there is a part that I do not know where it goes. Can anyone help me identify where this piece goes?? See attached picture
Thanks
Petehttp://forums.pelicanparts.com/uploa...1541880273.jpg