Accessing different parts of a Maya model

I have imported a Maya model in Unity which is not a single mesh. I have separated it into different groups in order to be able to move only some of its parts at any one time.

What I want to know is how do I access in Unity each grouping singularly.

If each part has its own meshRenderer, etc… they count as gameObject children. Can use the standard transform.Find("spigot") or spigot/filter to find them (from a script on the parent.)