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Q: Where is the low side port of the AC on 1997 Oldsmobile Cutlass

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I know where the Hi and Low ports on the AC but which one is the Low - I need to recharge the system
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High pressure port is forward in the engine compartment near the condenser, low pressure port is at the rear of the engine compartment near firewall.
Maybe the cutlass is different than the cutlass supreme because mine is a '97 cutlass supreme SL 3.1 and the ports are under the back side of the air cleaner housing on the drivers side, and the lowest port is the fill port.
THIS I am an expert in,, got the burn marks to prove it!! The low or side you want to put the freon in is the BLUE cap, the other one I think is yellow and is much bigger. It is located behind the motor,,you can see it near the firewall if you stand on the passenger side of the car near the tire and look down and to the left,, its about a footish down so may have to push some stuff away to see it... problem with putting freon in is,, car has to be running and if you put too much in, car will make a huge banging sound when it gets real hot and then u lose cool for a bit, in this case you gotta let some out (not really legal,,,but) It is a major B**ch to get it on correctly so get a few,,sometimes good idea to get the one with the flurescent stuff to see where you are losing it,,hopefully you have no air in the lines as well.
Maybe the cutlass is different than the cutlass supreme because mine is a '97 cutlass supreme SL 3.1 and the ports are under the back side of the air cleaner housing on the drivers side, and the lowest port is the fill port.
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