2000 Mitsubishi Montero Sport P0173 Code: How to Identify O2 Sensor Position (Bank 2, Pre-Cat vs Post-Cat, Driver/Passenger Side)

I'm experiencing a P0173 fault code on my 2000 Mitsubishi Montero Sport. The code indicates a fuel trim issue in Bank 2. I need help identifying which oxygen (O2) sensor is referenced as #1 or #2, and where each is located—specifically whether it's before or after the catalytic converter, and whether it's on the driver's side or passenger's side. Can someone clarify the exact positioning of O2 sensors in Bank 2 for this model? This will help me diagnose whether the issue lies upstream or downstream of the cat, and if I need to replace a sensor or adjust fuel delivery.