The Focus 2 uses tool-less clips to hold the SSD in place. You simply press it towards the clips to secure it in place. There is no need for any screws or brackets for the two mounting positions behind the motherboard.
The case also has another mounting position for SSD's in the spot where 3.5" drives are installed. To install two extra SSD's in this position, you would need an SSD bracket kit - Type D.