rupp ss-5 tank mounting??

#1
i understand that the rupp ss-5 tanks mount how a normal motorcycle tank should mount (by sliding the front part into the rubber gromets). But how does the back of the tank mount to the frame.. I noticed the seat slips into a notch but i dont see anywhere for the tank to bolt to the frame... did they have a rubber piece that the seat and tank slip into like the honda cl-100's and a several othe make did??? Thanks for the help in this long process of starting with nothin and makin it into somethin...............Ryan
 
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