They never called me to let me know the brackets came in. After looking at your pic I pulled my radio out and removed the (other)brackets that hold the nav module to the radio. I also drilled some holes at the bottom to try to better secure the nav module.
The red arrow is about the only place to put one. The green arrow hole has some threads behind it but it will put the head of the bolt too close to the bracket. There is also some double sided tape between the radio and module so it should be all good.