Don't worry I actually called their customer service which I'm sure left them saying "dumbass..."
Take the seat off first. Then wrap one side under the gas tank and around the metal part under the seat that holds the seat release etc. It'll be easier and make more sense once you do it trust me! Then the other side does basically the same thing and ends up at the same place. After all is installed adjust as necessary to cover the gas tank surround equally.
Re-install the seat and things are all held in place fine. Trust me it'll all be a lot more clear once you start installing. If not give them a call since I'm sure we aren't the only 2 people to have called them on this