How do I properly install the toner cartridge?

Shake the toner cartridge 5 to 6 times to evenly distribute the toner inside, then place it on a flat surface. Do not touch the surface of the Drum or expose it to light, and do not touch the electric contact point or the Toner Cartridge Memory. Align the cartridge with the Toner Cartridge Guide and push it into the slot marked with the appropriate color label until it stops. (Pages 19-21)