As was the case with the rear window wiper for Kaisers, there was a metal hollow tube with fitting on one end that screwed into the manifold position noted. The end of the tube was pushed into the rubber hose to supply vacuum to the unit, via the switch. Be sure to follow the run of ALL hoses to look for broken hoses, missing pieces, etc as the rubber deteriorated over time. Also, your switch could be bad as the floorboard mounted units tended to deteriorate as well.