The description of the EC330-G5u says

Special Designed firmware that supports TR-069 and TR-143 management (supports CAF funding). The firmware comes with EC330-G5u is compatible with major ACS software providers like Affinegy, Friendly, Genie etc. You can use ACS software to remotely manage the device, for firmware upgrade, remote config, speed test, diagnostic and troubleshooting etc. We also put ACS Discovery and DHCP activated by default, so that the installation is totally free of subscriber set up.

But I can't figure out how to connect it to our ACS server.

I was expecting a place to enter the ACS server URL and credentials but I don't see anything like that.

Has anyone done this (hook to an ACS server)?

How did you do it?