Cannot install water line

Question

I recently purchased the LG lfc20760 model fridge with French doors and the bottom freezer. My previous fridge had a water line and therefore i rejected installation. When i attempted to install the water line i noted no place for it to be installed. There appears to be one black rubber hose at the rear of the fridge which i believe is for drainage. There then that there are no other placed were a line could be connected. any help?!Thanks