Welcome to the world of Contours.
I take it you have a V6?
The cleaner is fed through the vacuum taps on the top of the intake manifold just behind the throttle body. To remove the vacuum line, hold the retaining collar with a small screwdriver while gently prying on the fitting to pull it out of the intake manifold. Take one line off at a time for cleaning.
If there is plenty of mileage on the car it's best to do a good cleaning with the upper intake/lower intake manifolds off first. The Berryman's/Seafoam won't get all that gunk out but it will help keep things clean once you've already done a "real" cleaning.
Taking the UIM (upper) and LIM (lower) off, cleaning with Berryman's spray and a bottle brush, cleaning the injectors, the TB and then reinstalling new o-rings, and gaskets will make a big difference.
Personally, that's what I'd recommend, a good cleaning with the UIM/LIM off and then the Berryman's to maintain that cleaning.
