To find the window fuses, you'll need to consult your owner's manual. The manual will have a detailed fuse box diagram showing the location of the fuse box (typically under the hood or in the dash) and which fuse controls which window circuit.
If you don't have the owner's manual, you can try searching online for a 1994 Cadillac STS owner's manual PDF. Many are available for free download. Alternatively, you can visit a Cadillac dealership or an auto parts store; they may have access to wiring diagrams. Be prepared to provide the VIN (Vehicle Identification Number) for the most accurate information.