strange "knuckle" on bumper

["Michael Paine" <mpaine@xxxx>]

Hello,

I have just put a deposit on my first delorean!! But I had seen 
something on it that struck me as odd and didn't know if others have 
seen it before. There is a strange circular protrusion from the middle 
of the front bumper about as big around as an american penny. It sticks 
out about 1/4 inch or so and has a metal face kindof like a screw might 
go in there. It doen't look added it's molded into the bumper itself on 
the black band part. Does anyone know what that is??