Maya - Using second UV for transparency mask?

PolyHertz

In Mayas Hypergraph, how would you go about changing which UV set is used for a specific input? I want to use one UV set for the color texture and a second UV set for the opacity/transparency mask.
In Max it's as easy as going into the materials opacity slot and changing the Map Channel, but I'm not seeing the option in Maya?

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PolyHertz

Thanks for the link! Seems to work if I go to Window > Relationship Editors > UV Linking > UV-Centric, and directly assign the mask to the second uv set through there. I do find it odd the feature would be hidden outside the Hypershade like that though...

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