91 integra inline and outline hose to firwall

I am trying to fix hose which connects to inline and outline section of the firewall on integra 91 gs. It has hose hookups for top and bottom into the heater core. Not sure which one is inline and outline. I just got the car it had heater core delete. But now i can’t find any good picture locations for the hoses. Also the heater valve does it connect on the inline or outline hose.