Epson NX100 - Manual (Page 26)

26 Replacing Ink Cartridges
7. Remove the yellow tape from the bottom of the ink cartridge.
Caution:
Do not remove any other labels or seals, or ink may leak.
8. Insert the new ink cartridge into the holder and push it down until it clicks
into place.
9. Once you replace all the cartridges that need replacing, lift the scanner
slightly, release its support, and lower the scanner.