"Part of this site is not secure" SSL issues with wordpress deployment

Hello,
I’m using the following tutorial trying to force http traffic to https for a wordpress site.
https://www.forums.cyberpanel.net/discussion/90/tutorial-how-to-make-redirect-with-or-without-www-and-redirect-to-https#latest

I’m able to generate successfully the SSL cert, but I’m still getting the warming from the brower saying that the site is “not fully secure”. Most likely because theere are links in the wordpress sites that still uses http …

How do you deploy a wordpress site in cyberpanel and make sure that it always uses the https? Could you please provide a step by step tutorial for 1.8.9?

thanks
Stoic

On my previous hosting using cPanel, i never had to use a plugin. Is everyone using a plugin to avoid this issue, i’m aware that the various plugins, but would like to avoid them if possible…