The end of the wire may be wrapped around any convenient support point.
Examples are pipes, hangers, brackets and bolts.
The best method is to use an eye-bolt or clamp. Wrap the wire twice through the eye and then around itself three or four turns. Remember to first install the Terminating Load at the end of the wire. Both the TL and the SWA match the impedance of the surface-wave travelling along the wire and eliminate reflections from the end of the wire. This ensures that the VSWR at the near end is low and the return loss is high regardless of wire length.