It had been done initially by someone else (of which I will not name)and was a complete shit hackjob, along with the seam welding of the chassis and interior “patch” panels.
I cut the remainder of that area out to get rid of the crap that had been put back there. Piss-poor welding that I wouldn’t have trusted on a lawn chair let alone holding up the weight of~15 gallons of fuel. I will be building a support for an ATL type bladder cell in the future. It also made it easier for me to access the areas to tie in the rear subframe to the cage(can see in that pic you quoted)
JVG needs to stop buying guns and weapons for ten minutes so he can get the cage painted before it rusts all to shit. :ninja