Epson ET-2400 User Manual page 130

5. Position the top of the ink bottle along the slot in front of the filling port, then slowly stand the bottle
up to insert it. Wait for the ink to fill the tank. Do not squeeze the bottle. Ink flows into the tank and
stops automatically when the ink is filled to the upper line.
Note: Do not force the bottles into position; they are keyed for each color.
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