Get Trello board link:
Go to Trello Workspace and open the Board you want to Embed in your Sales Room, Copy the link from Address of bar of the browser.
Make sure, your board is public, to Make your Trello board public: Click on Visibility icon in Trello and select Public
To embed, Trello board in your Sales Room:
Open Heybase > Go to Editor > Find Trello block in Left side panel > Drag and Drop to Canvas of Section
Enter the copied link in the popup appeared and click on “Save” button