Found in fear of my brand new 2016 Tahoe when I brought it bome from dealership. Found in rear along with cargo net, trailer wiring connector, etc. Anybody know what they are? (Ink pen added for scale) Dealer doesnt have a clue. Thanks in advance!

 

Do you have D ring connectors in the rear cargo area, is it possible they are beauty fillers ?
They look like fillers to me