I have a 1994 Porsche 968 and I can not find the lowside AC charge port. if you know where it is please post it.
You might want to also post this on a Porsche forum.
'94 was the year they changed from R-12 to R-134a…So that might be a consideration…(once you find the port…) Open the front hood and look just below fresh-air intake panel on the passenger side…
Check with a Porsche forum or A/C DIY forum.
It wouldn’t surprise me if it doesn’t have a low side port. I’ve worked on Euro cars from the mid-90’s that didn’t have one. Audi specifically comes to mind.