This is the part that seems a bit confusing, these are my assumptions of how this works. if anybody comes across actual instructions for installation please post here.
Not all of the parts shown here are required all the time.
Attachment 34260
The hammer has recesses for two springs and their guides
Attachment 34259
The top three parts shown separate are a reliability addition to reduce binding when the hammer moves forward and gives it more energy to solve light primer hits. Again I'm assuming as I have not seen these in other builds.
Attachment 34258
Showing a rough guesstimate of how the parts are supposed to fit together
Attachment 34261

The guide/spring/tube at the top require drilling a hole in the stock to install.
Most of this is compiled from a post I found once and cannot find again.