I don't think they did either. I suppose we could handwave it or I could have Xemnas post a note on the bulletin to come meet him at place X?

And they'll need to go to M88 which is in the M-C block, so they could meet in the hallway next to the F block maybe and then head North? Also, before they go he's going to tell her to call him by his fake name (since he used that to avoid certain meddling kids) while they are at Leon's and not to interverne whatsoever. Just so you know. xD;