Filter dashboard querys based on records returned

I have a dashboard which contains two queries. First query is top customers based on sales volume criteria. Second query is customer contacts. I want the second query on the dashboard to only display those contacts based on what the first query, top customer by sales, returns.
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Right now I can display the contacts based on selecting each individual customer ID on the first query. I want to be able to display all the contacts in my second query at the same time.

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