The cast iron fitting is a low pressure fitting and goes to tank.
If you have that same valve, then you should install the PB screw and use that port for the remotes.
After installing the remotes, add PB screw in the remote valve and run the PB out line to the 3pt.
If you have installed everything correctly, you should have 7 hoses from the valve and one input port with a plug installed.
If you have that same valve, then you should install the PB screw and use that port for the remotes.
After installing the remotes, add PB screw in the remote valve and run the PB out line to the 3pt.
If you have installed everything correctly, you should have 7 hoses from the valve and one input port with a plug installed.