Currently PWDM is only connected from PWE desktop. If you use PWDM from the web platform, it is not connected to the files stored in PW.
The web platform PWDM only allows to upload package or add from file system from your local computer. If we have already uploaded the files to ProjectWise Explorer/Web Connections, it would be great to be able to add PW documents to PWDM packages from the web platform side as well.