If I recall my checkride, I was told that I should plan and fly it as if I had my PPC. Of course, around Chicago, that doesn't matter, because an ATP is the required certification to get into the Class Bravo. (Okay, hyperbole
). I'm certain that if the transition is beyond the second checkpoint and you mention during the presentation of the flight plan that it wouldn't be legal as a student pilot, the DE would not have a problem with it. Especially if you have another way around.
That said, would it not be legal as a student pilot? Looking at the sectional and TAC, the class B airspace seems to explicitly EXCLUDE the corridor. therefore, the restriction on requiring an endorsement would not apply.
Again, we don't have to worry about that in Chicago, since they haven't seen fit to put in a corridor, either.