The Winter Cover Cable secures a winter cover to an above ground pool with a winch. Run the cable through the perimeter of the pool cover, then use a winch to tighten the cable and secure the cover.. The Robelle Winch for Winter Covers secures a winter cover to an above ground pool with a cable. Once a cable is run through the perimeter of the pool cover, use a winch to tighten the cable and secure the cover.