SmallRig 2209 Cage for Atomos Ninja V 5" 4K HDMI Recording Monitor - SKU#1893181
The cage mounts to the monitor by a 1/4"-20 screw on the top and two M3 screws on the left side. Across the top and bottom the cage features multiple 1/4"-20, 3/8"-16 holes, and an ARRI locating mount point on the base.