Request: how do I charge my AC with R-134a

I bought the refrigerant and cannot find the low pressure valve. Please help me out!!! I live in TX and the heat is beginning to get ridiculous!

Thanks

Service Ports are shown in the attachment I put on here. And I feel you on the heat, I'm in Houston. Makes me miss my AC system in my Neon. It was way stronger than the one in the Caliber.

Hey, Thanks for the schematic! much appreciated!... i'll try this afternoon when i get home... This valve is the one that sits on top and easily accessible, right?

Thanks!

Yes. The low side is near the strut tower, high side is in front of the engine.