Objects of a WTVariance

I need some help finding out how objects are associated to a WTVariance. For example, RelaventRequestData2 shows the association between Changeable2 and a ChangeRequest2.....what is the same association between the Changeable2 and a WTVariance?

Anyone know which table this information is contained in? I have looked and have been unable to find the references.

Thanks,

James Little