Lower agitator part

I ordered the agitator repair kit # AP3138838.

I turns out I need the lower part # AP2907691

How hard is that to install and where is the installation diagram.

I would like to do it myself I just need to see the diagram to see if i can pull it off.

Thank
Matt

It turns out that once you have removed the bolt that holds the top agitator piece on, the bottom piece will lift out.