The other end of the casing has a threaded hole in it, into which a threaded rod is attached (many are visible sticking out on the top right, waiting for their cables to arrive). Then, tension is applied to the bundle using the threaded rod.
The other end of the casing has a threaded hole in it, into which a threaded rod is attached (many are visible sticking out on the top right, waiting for their cables to arrive). Then, tension is applied to the bundle using the threaded rod.