Picture B is what mine looks like. With pb and p going to fel I think. One of my backhoe hoses goes transmission plug that was previously plugged. BX 24 had a hose connection from hoe into this ,so I routed my hose from hoe to this port. Other two hoses from hoe went into hydraulic loop.
Since your FEL has 3 connections, it should have hooked up exactly like the diagram in lucky post 13. Where was the third, tank, hose connected?
Let's start with your backhoe disconnected and the FEL connected as shown in the figure. Disconnect hose at port 'c' and connect it to the Pressure port on the backhoe valve. Run the hose from the backhoe valve Pressure Beyond port to port 'c'. Tee the backhoe Tank hose into port 'a' with the FEL Tank hose.
That was simplified to describe the circuit. Some of the hoses will not be long enough to do exactly what I said. Also, you will need male and female couplers so that the lines to and from the hoe can be coupled together (the tank line just needs to be capped) when the hoe is removed, to complete the loop (this, in effect, puts the FEL power beyond back to 'c' like it was). And, the hoses need to be long enough to be connected to the hoe before it's mounted, since you use the hydraulics to lift it onto the brackets.