Use the preprint DOI or URL.
A DOI is a unique identifier that you can find on many preprints. For example, 10.1101/2022.10.06.511170 or https://doi.org/10.1101/2022.10.06.511170.
10.1101/2022.10.06.511170
https://doi.org/10.1101/2022.10.06.511170