Nope. They do have Barrel Jack to 2-pin JST and 9V to Barrel Jack Adapter for the same price that you could cut for the same effect and have a ‘free’ 9V clip / JST connector. Though it would be more economical, and give you a greater length of wire, to get the cheaper Barrel Jack Extension Cable – M-F (3 ft) which would give you a spare female barrel jack socket.
Of course you could also make your own using DC Barrel Jack Plug – Male and some wire you have laying around.