At the 20 Pin White connector, A8 (Pin 8 ) Dark Blue, must be routed all the way to the hood pin under the hood. When the hood is open this will short the hood switch to ground and prevent the car from starting.
Now if you do not want to have a hood switch turn option A11 OFF.
If you mean valet switch = Safety override Pin Switch, then connect the same Dark Blue wire to one of the Safety switch pins and the other pin to a ground. This switch normally is hidden underneath the dash. When you toggle the switch to the ground side it will short the pin to ground and prevent the car from starting, just like the case with the hood switch, when you toggle it back it will allow the car to start normally.
Hope that helps.