where do you add water to engine
We need to know where the receptacle is to add water to engine

Available in both two-door coupe and four-door sedan versions, the 1991 Volkswagen Jetta was equipped with a variety of powerplants. Probably one of the most popular was the Jetta GL diesel, which received a boost in power for 1991, to 100 hp. Also available was the Jetta Carat, which came with a 100-horsepower, 1.8-liter four-cylinder gas engine, and the higher-end GLI, which was equipped with a more powerful 134-horsepower, 2.0-liter gas engine. All versions came with a standard five-speed manual transmission, while a three-speed automatic was optional for the Carat and the GL.
Standard features for the Carat and the GL included bucket seats, power brakes, power steering, a tilt steering wheel, and a rear window defroster, while the GLI added power door locks, Recaro seats, and alloy wheels.
While drivers noted that the Volkswagen Jetta was easy to maintain and fun to drive, they also pointed out that the interior could be noisy and that the cars were prone to mechanical problems.
We need to know where the receptacle is to add water to engine
I have the VW Manual with all the diagrams and trouble shooting but feel I'm missing something simple
sometimes when i turn the steering wheel,it makes noise
Twhat's the name of thepart that bolts onto the side of the engine has one hose going to it and that hoes I think goes to the heater core
Audio System
AM/FM radio
Convenience Features
Steering wheel: tilt-adjustable
Seats
Front seat type: bucket · Upholstery: cloth
Windows
Front wipers: intermittent
Audio System
AM/FM radio
Convenience Features
Steering wheel: tilt-adjustable
Seats
Front seat type: bucket · Upholstery: cloth
Windows
Front wipers: intermittent
Audio System
AM/FM radio
Convenience Features
Steering wheel: tilt-adjustable
Seats
Front seat type: bucket · Upholstery: cloth
Windows
Front wipers: intermittent
Audio System
AM/FM radio
Convenience Features
Steering wheel: tilt-adjustable
Seats
Front seat type: bucket · Upholstery: cloth
Windows
Front wipers: intermittent
Audio System
AM/FM radio
Convenience Features
Steering wheel: tilt-adjustable
Mirrors
Exterior mirrors: power
Seats
Front seat type: bucket · Upholstery: cloth
Windows
Front wipers: intermittent