Nikon d3s User Manual (en)

The Camera Strap
Attach the camera strap securely to the two eyelets on the camera 
body as shown below.
The BS-2 Accessory Shoe Cover
The supplied BS-2 accessory shoe 
cover can be used to protect the 
accessory shoe or to prevent light 
reflected from the metal parts of 
the shoe from appearing in 
photographs. The BS-2 attaches 
to the camera accessory shoe as 
shown at right.
To remove the accessory shoe 
cover, hold it down with your 
thumb and slide it off as shown at 
right while keeping a firm grip on 
the camera.