Your instance is the pattern, and the pattern is moved to the computer.
Since consciousness is numerically identical to the pattern (or, more precisely, the pattern being processed), the question of how to get my consciousness in the computer after the pattern is already there doesn’t make sense. The consciousness is already there, because the consciousness is the pattern, and the pattern is already there.
Your instance is the pattern, and the pattern is moved to the computer.
Since consciousness is numerically identical to the pattern (or, more precisely, the pattern being processed), the question of how to get my consciousness in the computer after the pattern is already there doesn’t make sense. The consciousness is already there, because the consciousness is the pattern, and the pattern is already there.