* Coupe: The 1996 Camaro RS coupe doesn't have a hatch. It has a trunk. The trunk release is typically located inside the car, on the driver's side, near the steering column or on the center console. There might also be a keyhole on the trunk lid itself.
* Convertible: If you have a convertible, it would also have a trunk, not a hatch. The release would be in the same location as described for the coupe.
In short, there's no "hatch relay switch." You're looking for the trunk release mechanism. Check those interior locations mentioned above.