I asked a guy once on here to show me how it mounts and all you really need to do is cut a T shaped metal bracket and mount it to the 2 fender bolts under the seat. Each side will come out Left and Right and hold the springs. And the hinge piece mounted to the tank bolt like youre saying.

I wanna say it was either Kaisersoze or Mikey790 from here that had it. Not sure anymore, it was a while ago.