https://www.nikon.com.cy/en_CY/product/accessories/accessories-dslr-cameras/connector-cover-for-usb-cable-port-uf-5-VBW92401
Connector cover for USB cable port UF-5
Connector cover for specific DSLR input ports. This cover protects the port when cables are attached to the camera.
cover forusb cableconnectorportuf