Location of oil at undercarriage

[konerko14]

I want to start changing the oil on my own for my 2004 Vibe Base A/T. There are two tanks underneath the engine area (left and right side) and I'm not sure which one to unscrew to do an oil change. I know I'm stupid - I don't know anything about mechanical aspects of cars.

[03vibedriver]

The one with the 14MM drain plug on the passenger side of the car.The transmission drain plug is smaller the the engine oil plug.

[BrettZ]

Don't feel stupid. First time I did an oil change I drained the transmission fluid thinking it was the oil. I then proceeded to add 4 liters of oil. Thank god I never started the car.