Canon BC-20

Draw adown the filling cock pole and rotate it 90 degree.

Open the cover of the Accessory and make sure the Inkjet Cartridge printhead upturned and circuit board entad, then, Push the Cartridge into Accessory.

Please notice the details in pictures

When the Cartridge in position, close the cover.

Rotate the Filling Cock pole 90 degree to reset it.