A/C recharge. Please help before I fry
 

Hello Everyone.
I hope everyone is having a great weekend. Mine will be miserable if I don't fix my AC. This weekend temps will be in the 100's until Tuesday hooray! I just have one simple question. Where is the low AC port located on my 2005 Saturn Relay. I appreciate all help and thank you in advance.

It's the blue cap on the fat line.

Thank you I figured out it was the fat line but my cap is black. 🤷 Thank k you so much.

They should be cold blue cap and high side red cap.

The caps on my 95 S car are both black. R134A. Didn't know there was a standardization of color.

There used to be. Probably costs more to make them other than black so black it is.

Is it true that the hose fitting on the refrigerant will only fit on the correct line? Meaning it will not properly fit on the high side line and it's made this way so that we would know it was wrong because it wouldn't fit correctly?

Yep....