Turbine towers

I think these are the towers ( masts? ) for wind turbines to-be. Being constructed on Queen's Island, looking across to them here from the Airport Road side of Sydenham.

turbine_towers_CW3I5297_2014-03-17.JPEG

I wonder what the sinuous metallic 'chains' are that descend from the top. They follow some sort of cables that curl down around the towers.