If I may? I think we have a whose on first issue.
I *think* the OP has what I had: The connect to octoprint link just doesn't show. I have Cura 2.7 and the default OctoPrint plugin didn't work for me. I had to download the 2.7 plugin, rename the old one and drop it in as the *exact* name as the old one.
If the OP does that, I think they'll get what they need.