Animation and Rigging Tools: FAQ, Known Issues and Feature Roadmap

Hello guys, I really need help for this. Since ART doesn’t have facial rigger, so I had to make my own (simple) facial rig, but I have difficulty in attaching the rig to the ART rig.

What workflow should I do to attach my custom rig to the ART skeleton? I’m using ART V1

I tried attaching (parenting) my custom rig to the head bone, but after the build control step, I couldn’t able to move the bone from the custom rig I made.
So, help? What should I do?
Thank you.