Samsung ML--6100 - Manual (Page 19)

2. 2 Printer Setup
4. Gently shake the cartridge from side to side 5 or 6 times to distribute
the toner evenly inside the cartridge.
5. Find the cartridge slots inside the printer, one on each side.
6. Grasp the handle and slide the cartridge down between the cartridge
slots, until it drops into place.