Well the backhoe has it's own set of section valves, and the log splitter has it's own as well. The loader valve is not used other than to operate the loader, it doesn't need to be connected for the rear hydraulic to operate. Just like when the loader is off you connect the high pressure "IN" line to the "Power Beyond" line. This power beyond line now gets another line "T"ed into which becomes the rear high pressure carry over "IN" line(part 140 in the diagram). This line has the hose connected to it which can then be connected to the new "RETURN" to pump line(part 170 in the diagram) which is connected to the new hydraulic block(part 040) (Note: the rear hydraulics has no "RETURN" to tank line like the loader does). The rear hydraulics are designed to operate with a standard 1 "IN" 1 "OUT" style valve. If you wish to use a valve that has power beyond capabilities you will need to plumb an additional "RETURN" to tank line for the waste port on the power beyond valve. Also, any valves connected must be "Open Center" style valves. I hope that clears things up.