I have a problem with my 2007 Roadster fuel pump and may have the same pump / filter as you . On my car the pump discharges through the white nozzle to the inlet of a standard Ford/Kayser AK11-CD fuel filter.The outlet of the fuel filter goes to a tee. One branch of the tee returns the fuel to the red nozzle on the pump and the other branch of the tee goes forward to the engine.There is also a return line from the engine that goes to the carbon cannistor and then to the tank via a small part which i still have to identify what it actually does !