I want to add refrigerant to my Toyota Corolla 1996

standing in front of the car, look towards the left side (passenger side) of the engine bay. You will find something that looks like an air pressure valve (this is much like you'd find on your car tire). One cap is marked with H (this is the high valve) follow this towards the firewall and you will see another one marked L. this is where you'll need to connect your 134a to. DO NOT over fill!!! watch the gauge and follow instructions carefully. Good luck!!