Where do I put the coolant in my 1997 Volkswagen Jetta?

Question edited for clarity.
Question moved to model category.

Volkswagen Jetta mk4 (1997 - 2003) - fuse box

Auto Genius https://www.autogenius.info > volkswagen-jetta-mk4-...
Nov 16, 2015 - VW Jetta mk4 (1997 - 2003) - fuse box. Year of production: 1997, 1998, 1999, 2000, 2001, 2002, 2003. Passenger compartment.

and Relays

https://forums.tdiclub.com/index.php?threads/2002-jetta-electrical-relay-panel-diagram.275487/

More

https://www.google.com/search?q=2002+Volkswagen+Jetta+2.0+relay+box+diagram

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Question edited for clarity.
Question moved to model category.

No, disconnecting the battery will cause even more problems like the vehicle not starting and running rough for a week.

Just close the sunroof manually and then check the fuses and relays.

https://www.google.com/search?q=1997+Volkswagen+Jetta.+The+sunroof+wont+close

https://www.google.com/search?q=1997+volkswagen+jetta.+sunroof+fuse+location

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Front or rear?

It doesn't go in the radiator. It goes in the round clear coolant reservoir. Open hood and it should be on driver's side near windshield. It's smaller than a basketball, and bigger than a softball. White (yellowed) plastic with a round black cap.

check the coolant and see if it is low then on the passenger floor board pull the carpet back about where you feet would rest.. and see if the carpet padding is wet. and smells of a odor. then if it is wet you have a heater core leak.and in some case when you turn the heater on the windows will get fogged up

To add Antifreeze into the coolant system, you add the fluid into the overflow resevoir. The radiator on VW's does not have a rad cap and they use the overflow. Hope this helps.

sounds like the trans is fried

check the fluid
then smell the fluid if it smells burnt then it likely is

if you added back the fluid you lost it e=will run out becuse thermostat aint o pen yet try again let motor warm up then cgk fluid

It may the "MAF" Mass airflow sensor

look at all your hoses and the seams on your rad, you will find the seams at each end of the rad, see thats its not liking from ether side. locate and look around your water pump the gasget maybe bad, and be sure look at your drain valve, if its plastice change it to metal if you can the plastice can wear out faster and can become brittle