Anybody have any idea where the freight entrance for Minute Maid Park is?

So, this is going to sound crazy, but I've been looking at all the MLB stadiums in Google Maps with the photogrammetry enabled and for whatever reason I decided I would try and find all the freight entrances for the stadiums (I mean, all the raw/frozen food has to get in somewhere). I'm bored, okay.

Anyway, for the life of me, I can't figure out where MMP's freight entrance is. There's a gated lot on the northeast/center field side of the building (Lot D) – this appears to be some kind of employee parking – and there's a big overhead door entrance right next to that with street access to Congress, but there doesn't seem to be an external loading bays that I can find.

Does freight go in that Congress St. door into some kind of underground bay?