Check the labels on the servos in your cyber:bot kit again, like you did in the Identify the Servos section near the beginning of Center the Servos First[1].
If the labels on your servos have #900-00040 printed on them, skip to the next page: Install the Servos[2].
If the servo labels have #900-00008 printed on them, or if they have no printed part number, continue here.
Parts List
(2) - Parallax continuous rotation servos.
Use a Phillips screwdriver to remove the screws that hold the servo control horns on the output shafts.
Pull each horn upwards and off the servo output shaft.