If you have bolts that cover hyd ports, then use the pressure and return ports for loader , remotes or whatever.
To check for pressure, take a 3000 psi hyd gage and adapt it to the bolt holes and check the pressure.
If you have an external pipe, you can cut and install fittings to install a loader valve.
Be sure and get a loader valve with PB.
You could also do the remotes at the same time for T-N-T, etc.