Then all you need is a PB sleeve from the manufacture of your valve, and run a hose from the PB sleeve to the rear remotes, and then to the 3pt. After that is all connected, the fluid will flow through the FEL valve and continue downstream to the remotes and to the 3pt. The return/out from the FEL has to go to tank.
There might already be something at the back for rear hyd.