Hello friends,

what is the best backlink structure?

Backlinks are on the side of SEO work which is performed out of your web site. On your web site (home page) in your case you have some keyword optimization. So your homepage have a set of keywords. So in google you have a rank to your homepage.
Now any entire page for google is something new and you will have to build up new links and work on keywords. That is separated to your homehage and I'm certain that won't affect anything.

Try to create different backlinks for different web pages of your website and try to make quality backlinks here.