I want to remove the rear winch from a salvaged m936 bed and build a recovery skid to utilize on the front of a CTL (skid steer). The winch motor has more hydraulic ports than I can reason. It has (2) -20 ports which I would think to be pressure and return depending on direction. But it also has a large -24 or maybe -28 line (like maybe a low pressure return?) as well as 3 -8 lines (like maybe flushing or case drain lines). I need help ciphering how to replumb these lines to CTL (only hose options are pressure and return which can be redirected from within the cab, and a case drain). Even if I use the original valves there is still a large 3rd line that leaves the valve body and returns forward underneath the truck. What is this 3rd line?