I am posting this, because it may not be obvious how to do it...
To get the CardDAV and CalDAV addresses, perform the following steps:
CardDAV:
1) In the web interface, open the address book.
2) On the left of the page, you will see a list of your address books. Right click on the book you want, then click properties.
3) Click on "Links to this Address Book"
CalDAV:
1) In the web interface, open the Calendar page.
2) Right click on the calendar you want to sync. Click properties
3) Click on "Links to this Calendar"
Notes:
1) If you are using an internal address, like "mydomainname.lan", that will not resolve outside your network (aka, in the real world), you will need to modify the address given, to reflect your external domain name.
2) The port required to access the CalDAV and CardDAV protocols is 443. You will need to open this port on your firewall, forward it on your router, or both, if you are accessing it, outside your network.