Epcot M&G is in Innoventions. You will show the CM your Disney Visa Credit or Debit Card, wait in a short line and enter one family at a time. There is usually 2 of the Fab Five there.
DHS M&G is in Launch Bay, kinda hidden. There is a sign on the wall to a hallway. You will show the CM your Disney CREDIT CARD, no debit cards accepted. You will go in one family at a time to meet Kylo Ren.