Filling: Without removing the feed — Drop ink into the filling opening with the drawing ink cartridge or the pipette and fill up to the level. Avoid formation of air bubbles. This could also be accomplished using a syringe if Pelikan Indian Ink is unavailable.

  7. Feed Aperture  8. Filling Opening  9. Slot & Nib Tongue

This is in French, Spanish & Italian... couldn’t find anything in english :( I knew there would be a day when my foreign language classes would come in handy...