Look at the end of the compressor where the two lines enter/exit. Look for the "S." That is the line you want. This is one of the Japanese compressors, right? It should be in the outer perimeter placement on the compressor.....not the center. BUT, make sure...don't just wimp out.
These cars changed over the years and your question is sort of dangerous, really. Put some effort into locating the S and following it's line.