low pressure A/C port

I have a 1996 Regal Custom 3.8L Series II Buick and my A/C blows out air but it doesnt get cold so I bought a recharge kit with a hose and gauge b/c it did the same thing last summer and i bought a can of R-134a refrigerant and got a friend at Jiffy Lube to put it in and it worked fine. So I figured I would buy a do-it-yourself kit and do it myself. But now I can't find the low-pressure port for my A/C though. Can anybody give me some pointers or reference points to find it?
Thanks in advance

the low side i belive is the larger diameter line and high side is the smaller the ports should be capped and it may have a H= high or L= low etched on the probably blue caps. the lines originate from the compressor and appear to be aluminum

Low side is cold

Honestly, If you put some in last year, you have a leak somewhere. Ask your buddy at Jiffy Lube if he has a leak finder. If he doesnt buy a leak detection kit, not the garbage in a can, the stuff in the can will plug up your system. Fix the leak and you'll be ahead in the end.

Good luck,
SellncarsI have a 1996 Regal Custom 3.8L Series II Buick and my A/C blows out air but it doesnt get cold so I bought a recharge kit with a hose and gauge b/c it did the same thing last summer and i bought a can of R-134a refrigerant and got a friend at Jiffy Lube to put it in and it worked fine. So I figured I would buy a do-it-yourself kit and do it myself. But now I can't find the low-pressure port for my A/C though. Can anybody give me some pointers or reference points to find it?
Thanks in advance

Morg,
The low side (cold) is the small jack. It's usually the small line coming off the condenser (coil in front of the radiator) and goes back to fire wall. The service ports both high and low have plastic caps on them. The low side is always blue and the high side is either red or blue. They should be accessible from the front of the vehicle with the hood open. generally they are in plain sight.
Dave