I assume you mean "how do you bridge out the fuel pump relay" to get you home in an emergency if the relay fails? (I don't think bridges need a fuel relay )

If so, you use a peice of 2mm thinwall cable and crimp on a male spade terminal on each end. Look at the base of the relay and identify terminals 30 and 87 on the relay socket. Plug one spade into 87 and the other into 30 and the pump will run permenantly (even with the ignition off if I recall correctly).