Step 1:
Separate your fin and your screw plate.

Step 2:
Place the fin plate into the centre of the box using the locator and slide it to the front of the box.

Step 3:
Insert the fin tail (end first) into the centre of the box using the locator. Slide the fin to the back of the board whilst holding at a 45 degree angle.

Step 4:
Push down on the front of the fin and place the fin screw through the fin hole and then the fin plate.

Step 5:
Tighten fin screws for a firm fit.