1. Cover the outlet hole with the orange outlet seal that came with the cartridge (a rubber band will hold this in place) or with your finger over the outlet port while wearing latex gloves or with some vinyl tape to prevent ink loss during refilling.
2. Use the "L tool" provided to push the Sealing Ball into the cartridge (tap on the 'L tool' if the ball is stuck). If you can't see the ball just above the "push" then peel back the top label on the reservoir side of the cartridge to expose the Sealing Ball. This is the ball Canon used to plug up the hole after they refilled the cartridge. (As an alternative you can drill a small hole into the reservoir side.)
3. Attach the needle to the syringe and fill with the correct color ink.
4. Slowly inject approximately 13 ml. of Black Ink or 6 ml of Color Ink slowly into the filling hole until the chamber is almost full. Unused ink may be returned to the bottle.
5. Seal the hole using the Green Plug or something you may have. Put your finger on the green plug and twist until it is seated well in the hole. If you drilled a small hole then seal it with a drop of hot glue.

This hole must be sealed air tight or all your ink will drip out.
6. Remove the orange outlet seal (or your finger, or the vinyl tape) from the outlet hole.
7. Replace the cartridge and run 1 - 3 cleaning cycles as per printer instructions.
8. If you have trouble getting your cartridge to print and the sponge side of the cartridge looks dry then drill a hole (or burn a hole with a hot paper clip) into the top of the sponge side of the cartridge. Stick the syringe needle into the sponge and fill with ink. You do not need to seal this hole.