The hose attaches in place of the beater-bar head unit. To remove the head unit, lift the headlight assembly, then turn the square gray Kirby emblem counter-clockwise 3/4 of the way around until the red triangle on the square portion aligns with the red triangle on the base unit (this disengages the belt). Then flip the silver metal fastener that was underneath the headlight to release the head unit and remove the head unit. To attach the hose, simply line it up so that the safety button is engaged by the hose assembly and then use the metal fastener under the headlight to secure the hose to the base unit.