Need help identifying a part from 2007 Mazda 3

Hi,

I recently had some seal work don on the car that required the mechanic to take out the engine. What happened was yesterday one of the kids ran a toy remote control car under my car and it jammed the under shield pretty hard that the part below fell out as it may have been hooked on to the shield and just resting there. The thing is I can see that it was previously installed with bolt due to the circular patter left in the dirt stuck to it. It has been bothering me what this part is so I figured I would post for some input. See below for part.
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Well, the plastic piece is a broken cable clamp. Those usually have an "anchor" part that goes through a hole, possibly the one on the left of the metal piece, but it is broken off in this instance. The metal piece I have no idea. If you clean all dirt and grease off you may get lucky and find a part number stamped on it which you could google.
 
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