Firstly open the cover of the wick. The wick will be enclosed in a small can with a door. Open this door. As you will open it, it will pop out to expose the wick clearly.
Next locate the screws of the wick that are attached to the oil container. Remove these with the help of a screwdriver. Once that is done, take out the oil container and carefully pour the lamp oil in the container.
Now that you have filled the oil container, screw back the wick and the oil container in their place.
Next leave the wick in the oil for the next 20 minutes.
Once the wick gets fully dipped in the oil, it will be ready to be lit. With the help of a match stick carefully light the wick. Once you light the lantern, carefully close the door of the wick container.