I put an example in your first thread on how it would look when you create chapters.
In your post:
Type your chapter title
Go to the post that has the information for that chapter and right-click on the number and choose "copy shortcut"
Go back to your post where you are typing the chapters
Above the area where you type your post are a bunch of editing icons. Click on the one that looks like this:
A window will open.
Control + V will paste the url you copied (when you clicked copy shortcut).
Click Ok
When you submit the post, your link will look like the example I put in the first post.
Hope that helps.