Here is what believe you are looking.I also wanted to write to that you can not treat any member on the open forum like that.They are trying to help you.Now that you have the information that you needed.Its up to you responded on the members that you just gave a hard time to,By saying you are sorry on open forum or send each member a pm telling them you are sorry. Thats what real members would do..
Two refrigerant system service ports are used to recover/recycle/evacuate/charge and test the A/C refrigerant system. Unique sizes are used on the service ports for the R-134a refrigerant system to ensure the system is not accidentally contaminated with R-12 refrigerant or service equipment used for R-12 refrigerant.
The high side service port (5) is located on the liquid line (3) above the receiver/drier (2). The low side service port (6) is located on the suction line (9) at the top of the engine. Both the high side and low side A/C service port valve cores are serviceable.
Each of the service ports has a threaded plastic protective cap installed over it from the factory. After servicing the refrigerant system, always reinstall both of the service port caps.