Does anyone know hydraulics

I just put a new set of dual action cylinders on my loader tractor. It did not have hoses for down pressure on the old cylinders. I have run hoses from the cylinders to the valve. Where you see the new hose with pipe dope in the pic was a plug that I pulled out for the hose. It has no fluid coming out of that hose for down pressure.

The question is what do I need to do to the valve to get down pressure?
loader 003.JPG loader 004.JPG