There's no real need to open it up. Does it have a small diagram on the side? Or a set of numbers, eg; 85, 86, 87a, 87 and 30? If so, it's a basic relay. I did a search and came up with a replacement that says it supersedes yours, and it shows up as a basic relay so odds are high that it's nothing complex.

Look on the bottom of the relay and match up the numbers with the colors of the wire in the pics. ah-kay has suggested one possible wiring combo and I suggested a different one.

About the only benefit I could see to ah-kay's suggested wiring would be that the aux fan would also shut off under WOT, or whenever the compressor shut off.