This thread goes into the key differences in program goals between the Nazi and American nuclear programs which may indirectly answer your question about plans.
The commenters in this thread talk about the telling technical details of the Nazi position and nuclear program to highlight how little they pursued the weapons.
A flaired user gives an overview of the reaction of the German scientists to the successful use of nuclear weapons an a detailed rundown of the Heisenberg's contributions and writing while working on the Nazi nuclear program.