What is this plug for?
 

Hi folks,

I sent in my Mazda 5 for a respray of the bonnet and front bumper and fender.
When I collected the car, I found a couple of these plugs lying in the car.
The workshop probably forgot to put them back.

Anyone knows what these plugs are for?

Thanks.

Must be some sort of internal fairings fastener ? Too many things get fixed in place by such fasteners...