Insurance sign up

I got my open enrollment email today and started applying for insurance through PH, but when I got to the part where I select my plan, I got a little confused. I assume I select the plan I want (EE3U) and then Waive the benefits on the one I don't want (EE28) but the way it's set up makes me worried I'm doing it wrong. Have I assumed correctly that that's how it works? Thanks!