Help with iTunes in Docker on Synology

I've installed LMS in Docker on a Synology RS1221+. I've checked the "Use iTunes" box in the LMS Settings on the iTunes page, but when I attempt to set the "iTunes Music Library.xml Location" and "Tunes Media Folder" media folders I receive the following error messages. The paths are the correct paths. I've also tried without the leading /volume1. I suspect that I need to map those two volumes in the Docker container but I have no idea what to map them to or where to find what to map them to.

Invalid value "/volume1/ITunes/iTunes/iTunes Library.xml" for xml_file
Invalid value "/volume1/ITunes/iTunes/iTunes Media" for music_path

Thanks in advance for your help.