Determine the location of your fuel pressure regulator. This location can vary so mount it where you want. Make sure the lines will reach the hardlines.

Once you have determined the location and mounted your FPR, cut the factory fuel hardlines to a proper length. Use a tube cutter and file down any burrs.

Connect line (C) to the fuel chassis fuel feed line. Circled in ORANGE.

Connect line (D) to the chassis fuel return line. Circled in YELLOW.

The fuel RETURN line is much smaller and shorter than the FEED line. The FEED line is the larger tube that originally goes to the factory fuel filter in an EG/EK/DC mounted to the firewall.

The line capped in the image is the fuel tank vent line (or charcoal canister line.) It is capped to prevent debris from entering the tank. DO NOT KEEP THIS LINE CAPPED OR PLUGGED. It must be open to vent at all times.