Trying to reinstall heater box (no ac) on 69 FB that has been torn apart for several years. No instructions with new heater core. Core has curved pipe on top and a straight pipe in a lower position, which on is inlet and which one is outlet? Confirming on the firewall the top position is out and bottom inlet? Which hose goes into intake and which one goes into water pump? Lastly the cables one is 22" long and the other 17" which goes to the defrost level and which one goes to the temperature level? Thank you in advance!