Node name in Daz Script

I cannot figure out the node name to use for Upper Face Rig in a script I'm trying to kluge together.  Lower Jaw is simple enough; lowerJaw.  However, I've tried several permutations like upperFaceRig, upperfaceRig, etc and nothing seems to work.  It doesn't thrown any errors, it simply ignores the Upper Face Rig.

Could anyone point me in the right direction, please?

Thanks in advance!