SSL and multistore

Hello.
I have a multidomain multistore, both domains have their own ssl. I have upgraded db from 2.3.1 to 3.0.2 and fresh opencart files with journal theme. Nothing else is installed.
For some reason in admin settings under Server i dont have Turn SSL on/off option, and i cant find a way to add it there, despite i can see it exists on opencart demo. I have attached the image of my admin Server tab, so you can see the Turn SSL On switch is missing. So i would love to know how to make it to show up there.
I have setup both config.php to use SSL for domain A and in admin settings domain A shows up with https: //domainA.com
Domain B also has its own SSL, and is setup properly as a multistore, but i dont see any way to make my store using SSL properly.
In theory we should go to http: //domainA.com see domain A, on login have SSL for secure pages, and if we go to http: //domainB.com we should see domain B and on login we should have SSL on secure pages. But in reality i cannot seem to achieve that, and i am not new in opencart multistores.
If i put http: //domainB.com in settings for second domain, it is not using https at all, and if i will put https: //domainB.com for domain B in settings, then all pages work under SSL, except main page of domain B http: //domainB , where i see the content of http: //domanA.
I really would appreciate some suggestions how to solve it. thanks.