TTI Instructions

Hi, I bought a tti manifold back system for my 68 barracuda. I waited over 6 months to install. I do not have any instructions and i am having trouble with where the muffler bracket mounts. I cant find any download on there website for install instructions. I called but we are having a problem hearing over phone and I was sent e body photos. I just need to know if those silly brackets mount to seatbelt location or the stock location. Thanks