Took delivery of a new 2015 Civic EX-L last week. When going in he glove box for the first time, I found a plastic bag with 4 rubber grommet type plugs each about 2" X 1-1/2". The are roughly rectangular with rounded corners. They are black in color. They look like plugs I have seen in floor pans or other body openings. I'm just wondering if they are needed or need to be installed to prevent any safety issues. Any help will be appreciated.