Spoke to someone who lost the rear seat cowl due too not having the safety cable on. Also  when the seat flies off the y usually get the leather damaged.  The price of the seat or seat cowls now justifies using them . You are purchasing two stainless seat safety cables replica of the original which rust .  Two new Stainless upset bolts and washers  like original. Loads of spares from my projects 

The cables are no  longer available  from Suzuki