Nikon F4 - Manual (Page 23)

Slide battery holder back into base until
it locks into place.
Attach grip to camera body and turn release lever clockwise until it stops.
• To remove base from camera body, rotate lock screw coun­
terclockwise using a coin.
•To attach base to camera body, align mounting screw and
guide pin with camera's tripod socket and guide hole, then
rotate lock screw clockwise with your fingers. (Do not use
a coin, screwdriver etc.)
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