Alright, I answered my own question. Since my car is a 93 is had r-12 in it. The tube I have originally came with an adaptor for the old fittings, but they are long gone. Unfortunately, it looks like I have to buy the whole f$*#ing kit, of which I already have every part (2 cans of frean and a tube) except for the little adaptor. 60 bucks for a 2 dollar part. Jesus.