Slice Timing Correction: Also shift onset?

Hi everyone!

In SPM, I performed slice timing correction with the middle slice as the reference slice and a TR of 2.
However, now I am wondering whether I should add 1 second to all my event onsets to align them with the corrected slices. Would this 1 second be of value to the model or is its effect negligible? Or does SPM account for this automatically?

I saw an old topic on this issue, but it was not answered yet.