There are a few things you need before you can put a car top carrier on your car. First, you will need to find a place to put the carrier. You can use any surface that is not too hard or too soft. Second, you will need some type of adhesive. Third, you will need some type of straps. Fourth, you will need to make sure that the carrier is large enough to fit your car top. Fifth, make sure that the straps are tight enough to hold the top in place. Sixth, make sure that the carrier is long enough to reach all of the corners of your car top. Seventh, make sure that the carrier is wide enough so that your car top can fit through it easily. Eighth, make sure that the carrier has two straps so that it can be tightened evenly around both sides of your car top. Ninth, finally, make sure that everything is ready to go and attach it!