Question:
Is it permitted on Shabbos to put cuff links in to a short with French Cuffs, in order to wear the shirt on Shabbos?
Answer:
It is hard for me to understand your question. If you mean to ask regarding Tofair because you are attaching the two sides of the sleeve with the cufflink, that would not be an issue, because it is similar to buttons or snaps, that are made specially to be taken on and off, and not similar to tofair. If you have a different reason let me know.
Best Wishes
Sources:
M:B 340-29.