Your code is in Smartsupp > Settings > Chat box > Chat code, insert it and Save.
We made steps to create an app for Wix. Unfortunately Wix is blocking visitor recording technology due to technical limitations. It is not possible to use any visitor recording technology on Wix at this moment.
We will continue our talks with Wix and hopefully they will add support soon. We recommend you contact Wix directly as more requests from users will motivate them to enable 3rd party visitor recording.