Round body bumper identification ?

[68 CUDA FORMULA S]

Does anyone know what these round bumpers are for in this DMT body bumper kit, can't seem to find out where they go. Borrowed this picture from another thread.

 

[Oldmanmopar]

Deck lid Duster Demon.

 

[68 CUDA FORMULA S]

Thank You, now I know why I could not find them on my 68 Barracuda.