relieving fuel pressure

On a 91 corolla, when you are relieving the fuel pressure, where is this little fitting that you use to relieve the pressure? Is it underneath the car, near the engine? Where is it at?

Not all cars have a fitting to relieve fuel pressure. Here's what autozone says.

http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/16/a8/4a/0900823d8016a84a.jsp