Where is the filler plug on a 2005 Toyota Echo with a manual transmission?

On a 2005 Toyota Echo with a manual transmission, the filler plug is located on the side of the transmission case. You can typically find it a few inches above the bottom of the transmission, often towards the rear. To access it, you may need to lift the vehicle for better visibility. Always ensure the vehicle is securely supported before attempting to check or change the fluid.