In your Sync Dashboard, click on the site to which you wish to add Google Search Console. You’ll see a Search Console tab on this screen. Click that, and then click Authorize Account to connect the Google Search Console.
This will take you to an authentication screen where you will be asked to sign into your Google Account, and then grant access. Click Allow to connect Sync to your Google Search Console.
NOTE: Please allow 24 hours from creating a Google Search Console to connecting it; until Google populates the console with data, you won't see results in your Sync account.
Once Google Search Console is successfully connected, you'll see the Search Console:
You can change the timeframe at the top of the screen or use the tabs on the left to click between Search Analytics, Sitemaps and Crawl Errors.