How do I add a 'responsive' adsense display ad, in just the body of my website? Not body start or end.

I’ve been trying to get the responsive adsense display ads to display themselves in the sidebars, but wix only gives you options to input the code either in the body start or end, which are not the sidebars. The sidebars are in the body middle.

And so the ads only end up either being just below the header or below the footer of the webpage.