How do I install the toner cartridge in the SCX-4200?

Open the front cover, remove the toner cartridge from its bag, and roll it 5 or 6 times to distribute the toner evenly before inserting it. Hold the cartridge by the handle and slowly insert it into the opening until the tabs on the sides lock into the corresponding grooves. Close the front cover and make sure it is securely closed. Do not touch the green underside of the toner cartridge to avoid damage. (Page 2.2)