Targus NOTEBOOK SECURITY DEFCON User Manual page 4

WARNING: To use the Cable Lock or reset the combination you must
set the lock to the current combination.
The combination appears in the windows.
3
Using a small flat-head screwdriver or similar object, push in
and rotate the reset screw 90 degrees clockwise so that the
screw's groove appears horizontal.
4
Using the dials, enter the new combination.
5
Rotate the reset screw 90 degrees counterclockwise, back to
its original vertical position, to save the new combination.
6
Record the combination in either the space provided at the
end of this guide or another secure, easy-to-find place.
Testing the Combination
Before attaching the lock to your notebook computer:
1 Turn the dials to disguise the combination.
2 Return to the combination you set.
3 Check that the locking button (to the left of the combination
windows) depresses completely.
4