Barry,
Usually there is a grommet attached to a length of cloth at the top of the  
sail. Mine had a couple of washers to prevent it from pulling loose. The bottom 
 line (also the furling line)is used to tension the sail downwards. It's been 
a  while since I've had the sail apart, but I recently helped Ed Kroposki 
with his  sails, so I'm going from memory. There should be a small screw hole 
somewhere  near the top of the furling tube. Be careful not to bend the furling 
tube at  all, or furling the sail with a wobbly tube can be hard. It has to be  
straight.
 
Rummy