Calling all Road Warrior owners - RWS, RWT, RWM

So I went to install the rear roadmaster sway bars and the mounting brackets to attach the sway bar link rods is way up inside the frame, and it’s riveted, not bolted, which would appears you have to get up there somehow,
grind off the rivets and then figure out how to get a bolt through in the very hard to reach spot in the frame beam.

Please comment if I am mistaken, but unless one of you has an answer I haven’t figured out.. I am not going to install them and I’m sending them back