Installation steps.
1. Install replacement body posts into the chassis. Short in the rear, long in the front.
2. Using Shoe Goo or E6000 glue one magnet to the top of each body post.
3. Place a second magnet on the top of each body post and lightly scuff the top surface of the magent
4. Using Shoe Goo or E6000 glue the mount plates on top of the magnets. Be sure to fit the Front and rear mount plates in the right location and have the top of the text towards the front bumper.
5. Once dry, apply more Shoe Goo or E6000 to the top of the mount plate and then place body in the dersired location.
6. Allow to glue to fully cure overnight before removing body for the first time.
7. Magnets should now be mounted firmly to the underside of the body.

To see the install in action, check out RC Girl's how to video below (6.31 mark):

https://youtu.be/7OSDLiclFns