How to use star ratings from Google My bussines in Rich Snippets?

Hi. I’ve got several ratings in Google My Bussiness, and also I’m trying to incorporate Rich Snippets to my site.
How can I use the ratings, people gave me in Google , in Rich snippets?
Some plugins I’ve tried (like Rating-Widget) proposed their own database system but I want to use the ratings I already have.

OR

If this is not possible, how do I add the stars manually?
I’ve red that I can add such tags into the page:

<div class="notewrapper" itemprop="reviewRating" itemscope itemtype="https://schema.org/Rating">
<meta itemprop="worstRating" content="1" />
<meta itemprop="bestRating" content="5" />
<meta itemprop="ratingValue" content="5.00" />

But where should I put them?