The AAR pods on the KC30A / A330 MRTT are installed on the outboard engine pylon points of the common A330 / A340 wing.
There is no need for a bespoke FSTA wing per se!
Unfortunately the pods are not hung on the outboard engine pylon points of an A330 wing because there aren't any. Neither is the wing strengthened at that point (why would you want un-necessary weight?). The wings are the same in size and shape only. There are considerable modifications to be done at the rib 26 position before the pods and pylons can be fitted.