These suppliers are not yet integrated with our APIs so we configure them with FTP Downloader. In such a case you can upload the content file in Vervotech's supported format to get the mappings done. Please refer to this documentation for details for the same. 

In the below image, the highlighted is the FTP integrated supplier and rest are API-integrated suppliers. 

Please check How to self-update the FTP supplier's data? for more details.