The TS4-A-X (TS4-A-F, TS4-A-O, etc) has removable module clips. Under the clips are two mounting holes that can be used with any fastener (screw, bolt, etc) for mounting the TS4-A-X to racking or any other supporting structure.
Here is a view of the back side of the TS4-A-X unit. Note the two metal clips on the right-hand side.
Using a narrow screwdriver, pry gently upward to release the clip, then pull it gently away.
Now we can see the tab and the mounting hole.
The mounting holes are 9mm in diameter, and will accommodate an M8 or 11/32" bolt.
See also the attached CAD drawing showing the attachment of a TS4-A-X to racking.