OK, gotcha. That seems to be a bit of an issue with all of these kits that I've seen. I have 2 gm trucks and 2 jeeps, so I'm hopeful I'm covered by this kit. But also have 7 or 8 other models I would potentially need to use this on at some point, so we'll see how it goes.
That black cone shaped one I believe is to just get wedged into the opening if you don't have the right lid. But I could never get it to seal