Where do these body bumpers go? help

[Rutro]

Ok, once again the little stuff is killing me.
Be kind, where do these go?
Thanks!

[Floyd]

Rear frame rails - axle bumpers

[dodj]

I'm thinking it would take a hell of a bump to compress the rear springs enough to ever hit those? Like, you probably in big trouble....

[1 Wild R/T]

I'm thinking it would take a hell of a bump to compress the rear springs enough to ever hit those? Like, you probably in big trouble....

And yet Mopar felt they weren't heavy duty enough for certain applications so police/taxi & 440/Hemi got bigger ones....