HP Officejet 6100 - Manual (Page 38)

3. Press the front of the ink cartridge to release it, and then remove it from the slot.
4. Remove the new ink cartridge from its packaging.
5. Using the color-coded letters for help, slide the ink cartridge into the empty slot
until it is securely installed in the slot.
Make sure that you insert the ink cartridge into the slot that has the same colored
letter as the color you are installing.
6. Repeat steps 3 through 5 for each ink cartridge you are replacing.
7. Close the ink cartridge access door.
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HP supplies and accessories
Chapter 4
34 Work with ink cartridges