1. Prepare a tool: You will need a thin and sturdy tool, and a flathead screwdriver is the best choice for this task. You can see an example in the attached picture.
2. Position the cover: Place the plug of the charging port cover right next to the corresponding hole on the machine.
3. Insert the plug: Use your tool to help push the soft silicone head completely into the hole. Make sure to press around the entire edge of the silicone head to ensure it is fully seated.
4. Secure the cover: Gently push the plug in the correct direction to finish the installation, and then close the charging port cover tightly.
You can find a reference picture of the tool and a demonstration video for the installation in the attachments and through the link provided below.
https://www.youtube.com/shorts/BE4aOtzjfco