1996 Jeep Cherokee low side AC port

See my profile----Generally the "Low Side" is the larger port (I do not know your rig)

It is found ON or really close to the compressor, in most cases.

And is usually on the LARGER of the 2 lines ("High Side" is usually on the SMALLER LINE.

If your A/C is somewhat operable---The "Low Side" will be on the cold line (may have sweat forming on the line).

Usually has the BLUE CAP screwed onto it.

The Medic