In my photos:
Red = outlet, pressure. 3/B, Hose 6, FEL inlet
Green = inlet, Power Beyond. 1/C, Hose 5, FEL PB stock, Remote PB current
Md. Blue = FEL Tank. 4/D, Hose 7, FEL outlet stock
Lt. Blue = Remote Tank. 4/D, Remote outlet current
Numbers, letters, and hoses are from the LB552...