Why do the concealment markers have a morale level printed on them?
The usual application of the Dummy ML level of 7 is when an “unbroken” vehicle (see A12.1) enters a hex containing a a concealed unit (without using VBM). You must pass a PAATC to remain concealed. If the stack being attacked is a dummy stack, then it uses the Dummy ML of 7 to see if they pass the PAATC. The Dummy ML is also used when dummy stacks undergo a Bombardment MC.