That depends entirely on how attractive you want it to be. I, personally, would attach it with duct tape, but I'm kind of a slob that way.
Another more secure option would be to use a couple of large diameter radiator hose clamps, but then you have to worry about the little bulge of the worm screw hanging down and snagging on stuff.
Maybe nylon cable ties combined with duct tape would be the best option? The cable ties would do the bulk of the work and the duct tape would keep them from sliding around.