Difficult to say without seeing the wiring colors. At the relay (in the diagram-Bentley) I see one to Ground br, one to power gn/ge(fuse box), two going to the transfer fuel pump ro/gn, br/gr, two going to the main fuel pump br/sw, ro/sw, two going to the ECU gn/gr, gn/ge. Wiring page no. 28/18
ro=red, gn=green, br=brown, gr=grey, sw=black, ge=yellow. These should be at the connector in the RS6 wiring at the Controller. According to the wiring diagram these all change to different colors through plug connections before they make it to their devices which I can list. You probably already know but the controller only delivers 10volts to the pumps under most conditions and delivers the full 14volts (Alternator voltage) when full throttle or close to it. They did this as at lower fuel consumption the return lines and Fuel pressure regulator cannot handle that much fuel being returned to the tank so they cut the volume by reducing the voltage. Hope this helps but with a full wiring diagram next to the connections it might be a little tedious but fairly easy.