The last one is the power cable coming from a wall wart power supply I had laying around. Note that the wall wart I used has a 5v regulated output, so I did not need to use a regulator or anything inside the base unit. Just a standard servo horn screwed into the edge of the tilt plate. Notice that the servo is the entire support for this side of the tilt plate. The light gray part with a button on it is just the USB camera I used.
Most cameras have a standard size threaded hole on the bottom.
I simply drilled a hole in the center of the tilt plate and passed a bolt through that fit in the camera. Close up of the pan servo. Pretty simple, again, just a standard servo horn screwed into the frame. Note though, that the pan servo is not centered to the entire frame, but rather its centered to the cameras lens. This keeps the camera viewpoint centered with the pivot point of the pan servo.