Use the 13mm Wrench to screw/unscrew the bonnet closing mechanism so that it gets adjusted. Usually it needs unscrewing a little so that it reaches the closing mechanism on the car.

The missing black paint on the screw indicates how much this bonnet closing mechanism needed adjustment

After adjusting, if unscrewing was needed and the closing mechanism screw shows unpainted parts it would be wise to spray-paint the area to protect from corrosion/rust in the future.