Where does the yellow hose go to?

The yellow hose on the uniform remains somewhat in mystery. The hose was connected to the middle of the left thigh through a rubber boot. Where the hose ends up is open to interpretation... in some scenes of Ghostbusters (early filming dates) the hose appears to just wrap around the belt or placed somewhere on the back of the belt. In later scenes (with later filming dates), the hose can be seen going into some kind of connector on the center belt in the rear.