1997 Daihatsu Charade Car heater

I have just bought the car and the heater has been disconnected.The two pipes that go through the firewall are not joined to the water supply.I believe the heater core was leaking so that is why this was done. I want to get some diagrams of the connections etc so I can take it apart to get it repaired. Every thing else is operating fine but with cold air only!