My 2003 Camry's air conditioning has not been running at peak performance, taking much longer to to cool the car. So I bought R- 134 refrigerant can that includes leak sealer and oil, and has a hose attached that measures PSI to put in the proper amount of refrigerant. But the directions say to connect the can hose to the low-pressure port on the AC system. Where is the low-pressure port on a 2003 Toyota Camry?