How to get this on an existing page or as a sidebar widget

I deleted this plugin though I would like to use it. When I set this up it asked where I wanted to put it. I put my blog page, thinking it would be at the top of it, but instead it made its own page on the menu. Originally, I wanted to be on a sidebar widget but there doesn’t seem to be a way to do that.

The page I need help with: [log in to see the link]