Samsung MSYS SF-6900 - Manual (Page 14)

1.6 Setting up your machine
3. Unpack the toner cartridge. Grip the cartridge firmly and pull the sealing
tape slowly from the cartridge. You may feel some initial resistance.
As the tape will have a small amount of toner on both sides, take care
not to get toner on your clothes.
Installing the toner cartridge
1. Open the cover by pressing the cover release button.
2. Raise the cover.