Heater hose diagram needed

Got a coolant leak somewhere. Truck drives fine, coolant temperature gauge stays in middle. But after parking truck overnight, we find coolant puddle on driveway, below where front passenger sits? Used coolant dye and located a small puddle of coolant, under the cab (not inside) way down on the bottom or below the firewall, on the front passenger side of engine bay. No wet carpet or smell of coolant inside cab so probably not the heater core. Neighbor said some Ford's with the 5.4L have a heater hose that runs from the back of the water pump, under the intake manifold, that routes back to one of the heater hoses going through the firewall. Neighbor said leaks from this hose frequently leak down into this area. Can't find any information, or heater hose diagrams for my truck listed above Supercrew, 5.4L/2V engine, or if this even applies to my motor. Need help diagnosing leak location, heater hose diagram, and if my truck has a hose under the intake diaphragm.