In the context of the universe, the concepts of "left" and "right" are typically defined relative to a specific frame of reference. In the absence of a defined frame of reference, such as a fixed set of coordinates or landmarks, it becomes challenging to establish a universal sense of direction.
When it comes to wormholes, these hypothetical structures are theoretical solutions to Einstein's field equations in general relativity. While they remain largely speculative, they are often depicted as shortcuts through space and time, connecting distant regions or even different universes.
If one were to encounter a wormhole and use it as a time-tunnel, determining the "correct" side would depend on the specific properties and characteristics of the wormhole itself. Unfortunately, since wormholes are purely theoretical at this point, there is no established method for determining which side is "correct" or if such a distinction even exists.
However, if we imagine a scenario where a traversable wormhole is somehow discovered and could be used for time travel, it is conceivable that scientists and researchers would develop a system to define a consistent frame of reference within the wormhole. This frame of reference might include specific markers or guidelines to identify one side as the entrance and the other as the exit. Without additional details or a concrete theory of wormholes, it is challenging to provide a more precise answer.