Nikon D700 - Manual (Page 265)

239
Q
D Connecting Cables
Be sure the camera is off when connecting or disconnecting interface
cables. Do not use force or attempt to insert the connectors at an angle.
A Camera Control Pro 2
Camera Control Pro 2 (available separately; pg. 388) can be used to control
the camera from a computer. When Camera Control Pro 2 is running, “c”
will be displayed in the control panel.