Pass Side Kick Up Hanger

I am installing a 340 into my 71 Dart and I want to replicate the factory exhaust system. My car does not currently have a hanger on the passenger side kick up. I see that this hanger is being repopped and can either be welded in or bolted in.

My question is......... did they weld or bolt these in at the factory and where exactly was it mounted? Does anyone have a picture of where/how it is mounted, or can someone take a pic that would show the location? Thanks for the help! L8r

Jim