How does autofocus work on Nikon cameras with in body focus motors?

My Nikon D100 has an in body focus motor, but try as I might, I can't see where on the camera, the AF screw is. Just out of interest, does anyone know how autofocus is set up with Nikon cameras with in body focus motors?

Whereabouts in the body is the motor likely to be? How big is it? How does it attach to the lens?

The position and size differs from model to model. The output is always the same little screwdriver bit that sticks out at the 8 o clock position.

This image of an n90 shows it, your D100 will have the same screwdriver bit.

Move the focus switch on the front of your camera to M and you will see it being withdrawn.

Take a look at this photo:

The AF screw is at the lower left part of the metal ring.

All auto-focus Nikon cameras have in-body auto-focus motors except the entry level ones (under $1, 000). All the Nikon 35 mm cameras from the F4 on can use any Nikkor AF, AF-I or AF-S lens

When you look at the lens mount with the lens removed, you will see a little spring mounted prong at the seven o'clock position. That is the drive that auto focuses the older Nikkor AF lenses

The AF-S lenses with internal auto-focus motors, focus faster and more accurately and bypass the motor in the camera