Epson XP-810 User Manual page 273

8. Remove the cap from the cartridge and store it in the bag that came with your product for later use.
Note: Save the cap so you can recap ink cartridges before storing or disposing of them.
Caution: Do not remove any other labels or seals, or ink will leak.
9. Insert the ink cartridge head first into the ink cartridge holder. Then press the bottom of the ink
cartridge down until it clicks into place.
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