There are subtle alignment marks you should note as you take it apart but otherwise it's pretty straight forward. Take pictures.
This also lines up the horn ring slot
The lock ring plate also has spines to align it up to the shaft. It can be forced on the wrong way and then your horn contact won't be installed properly
Here is the horn contact missing the contact button.
The hazard button unscrews and not pull apart as they often do.
You might want to tie a string around your old electrical connection before you pull it out to make it easier to pull the new plug back down.
Write "TOP" on the horn plate before you take it out so you know which way is up. If you mount it upside down, your horn will randomly sound.