1994 Saturn SL2 how to put refrigerant in the car

Coming off your a/c compressor there are two hoses you will see two black caps if they didn't get lost. That's where you fill the system follow each hose from the compressor the one that goes to your firewall is your low side that's the side you want to fill the system from. You will need a charge hose kit that you can get at the auto parts store or like walmart. If the system is completely empty it will take 24 oz's to fill it. Your system takes r134a the instructions will come with the fill kit. Let me know if that works or if you need anymore help.