The transmission fluid dipstick on a 1992 Buick Regal is usually located on the passenger side of the engine compartment. However,
you should consult your owner's manual for the exact location. The dipstick will be marked with a "Transmission Fluid" or similar designation. It might be near the back of the engine.
Don't rely solely on general advice like this; checking your owner's manual is crucial to ensure you're adding fluid to the correct place and avoiding damage to your car.