The parameters have distinct names.  Here's a sample from a stove figure with
controllable ambient 'burners'.

This paragraph is on the BODY:

        shaderNodeParm element-right_PoserSurface_6
            {
            name rightburner-ambient
            initValue 0
            hidden 1
            forceLimits 1
            min 0
            max 10
            trackingScale 0.01
            keys
                {
                static  0
                k  0  0
                }
            interpStyleLocked 0
            }

And this is how the animated part looks within the shader nodes of
the burner's own material:

                nodeInput "Ambient_Value"
                    {
                    name "Ambient_Value"
                    value 0 0 10
                    parmR "element-left_PoserSurface_6"
                    parmG NO_PARM
                    parmB NO_PARM
                    node NO_NODE
                    file NO_MAP
                    }

Note that parmR, which normally would be the red color, takes on the
name of the control.

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