which hose to I block off for the heater core?

[blackmaxx96]

There are two hoses going into the firewall, one on the passenger side and one on the driver side...
I don't want any coolant going through my heater core because that electronic/vacuum controlled thing on the passenger side isn't hooked up and there are no wires or vacuum hoses for it.
I bought a manual heater hose valve but I don't know which hose to block off.

Thanks,
Michael

 

[GrimJack]

Why not just install the manual valve in place of the vacuum operated one?

 

[Nick M]

If you bought a manual valve, why do you want to block it?

 

[blackmaxx96]

I just finished doing that.
No more heat!
It was pushing heat through no matter what I had the climate control set to... I won't need heat for another two months or so, so i'll open up the valve once it starts getting cold!