I drive an '86 Volvo 240 in the US where we can buy generic conversion kits to modify older cars to use the newer R-134A A/C refrigerant. I want to do this job but have no experience working with air conditioning. I hope someone out there has the info I need. <P>The instructions in the kit say to add refrigerant and lubricant via the access ports on the low-pressure side of the system. I only see one port, on the passenger side of the A/C condenser (next to the radiator). From the instruction description, this seems to be the high-pressure side, but I'm not sure. Where's the low-pressure port?