They can leak anywere. And, it is common if the Motor Mount on that side collaspes for the Powersteering belt or Pulley to cut into the Hose.
If you cannot tell where the leak is you need to degrease the area; afterwhich run the Engine and see where the leak is coming from.
If it turns out you need to replace the Oil Cooler Hoses I would look up how to do so as it is common to strip off some threads from the Aluminum Nipples that the Hose Nuts screw onto on the Oil Cooler.
Repair Links
http://www.peachparts.com/shopforum/diy-links-parts-category/
http://www.peachparts.com/Wikka/DoItYourSelf