Slip one end of the metal door hinge pin into the black plastic hinge frame on the fuel door opening.
Press the inserted end toward the outer edge of the fuel cap opening to give yourself some room to slip the other end of the door hinge into the opposite side.
Release the tension you have created on the hinge connection once both sides of the metal door hinge pin are fitted in the plastic bracket. Close the fuel access door.
Secure the two thin metal tension clips on the top side of the door hinge to connect the black plastic hinge-holding bracket with the green fuel door. Press the U-shaped clips straight down into position where the door and hinge brackets meet up snug next to one another.