Click on settings and then choose site settings, now from the Site settings panel, choose the page widget options, here you'll find the Chat widget, click on Chat option and then click on Customize button.
Now login into your tawk dashboard, click on Admin settings and choose Property settings from administration dashboard.
Copy the Site ID and paste it into you VINTCER chat widget parameter and click on the UPDATE button. Make sure to click on the publish button after making the changes.
You can see the widget has been added to your website, for changing its color, size and images make the required changes in tawk dashboard.