you need to know that Nikon built most of its lenses to tolerate a vibration table and the three screws you need to unto were covered in an adhesive and then screwed in

they need a screw driver that is a good fit and the screw heads locally heated (e.g. with a soldering iron) first to soften the glue

good luck

you can get good series E 5cm on the cheaper cams and throw away the cam