WebDAV configuration files

[morphxyz]

Heya

I know there are other posts related to the max upload file size but they're either about nextcloud or a jailed docker.

I need help locating the configuration files for the webserver providing the WebDAV share.
My WebDAV Share is running natively on TrueNAS Core 13.0.

Any chance we can modify the webserver/php configuration to accept larger files?
I wouldn't even mind to reapply the changes made after updates.

Because as is, the WebDAV Share cannot be used for Backups with large files.
I can't see increasing this limit breaking other features but I guess you never know..

Any Ideas appreciated