To add Brevitas as a syndication partner you must log in to your Buildout account. From there you can follow these steps:
Go to your broker profile and find the syndication tab
Connect to your Brevitas account or choose to sign up for an account
Once you are connected, all on-market listings that are marked for syndication will immediately push to the site
You can follow this link, for a quick how to video: https://support.buildout.com/hc/en-us/articles/360001393793-Brevitas-New-Channel