Upper Thread Guard for industrial Singer Sewing Machines

Edit: been informed by my mum that it is the UPPER thread guard.
Also should note it was for an industrial style machine the 211 G 566 in this case, but should work with all 211 machines and other industrial. Also added picture of it in use.

I was asked to create a missing Lower Thread Guard for my Mothers Singer sewing machine, and this is what I came up with, it works perfectly.

Simply slots into 3mm screw holes where the original piece was located, no need for screws.