The location of the cargo conveyor in the secondary hull of the Enterprise-B
The cargo conveyor was a type of technology used for moving cargo inside the secondary hull of the Excelsior-class starships in the late 23rd century. It connected the forwardmost cargo bays with the aft cargo bay.
In 2293, the location of this conveyor was labeled in the USS Enterprise-B master systems display on the ship's bridge. (Star Trek Generations)