export iphone carddav contacts to macbook

Hello, I have contacts on my iPhone coming from an CarDAV Server Mac OS X. The latter is out and I need to retrieve from my iPhone all the contacts to the Mac computer. I tried to connect and synchronise through iTunes but only the iClouds contacts are transferred. On the Mac contacts I continue to see only the iCloud contacts but none from the CarDAV ones.

How can I pass the contacts (under the CarDAV sync from the server) to the Mac ?

Thanks for your help.

Kind regards,

André