It should have come with instructions and pictures of the installation.
If it is like the one I just sold, there are 2 long plastic 'mounting' flanges on either side near the bottom of the fender well. These are to be inserted between the fender and the inner fender. There should be an extra piece of plastic to use as a guide tool. Insert the tool between the inner fender and fender then slide in the flanges on the bra. The lowest flange goes below the lowest bolt.
Get the one side's long flanges inserted first - ignore the upper, short, curved flanges for now. Then stretch the bra across the nose and insert the two long flanges on that side. Check alignment with the nose openings.
Now you can hook the two lower, small flanges into the bottom of the bumper.
Next, stretch the bra up the fenders and hook the two remaining flanges into the wheel opening around the fender. Make sure the headlight opening is clear. This may require you to switch from side to side a couple of times before it fits properly.
You may also need to bend the upper flanges some to ensure a tight grip on the fenders.
If you need to open the hood, you just unhook the top two flanges on either side and open the hood. When you shut the hood, make sure the bra is clear of the opening.
That's all I can remember at the moment.