A connection device is provided for meshing of gears on disparate modules, such as those that form a mailing machine. A tongue having a rack can extend from a first module into a cavity formed in the second module. A spur gear is mounted to the second module and can engage the rack of the tongue received into the cavity. A mechanism controls movement of the first spur gear. The mechanism can include a drive gear meshed with the first spur gear and concentrically mounted on one end of a drive shaft with a worm gear mounted concentrically on an opposing end of the drive shaft. Rotation of the worm gear causes the spur gear and the drive gear to rotate and cause movement in the rack received into the cavity and separate or bring together the modules as a result of the movement in the rack.