As above. I have a small wrist so a few links missing is probably fine. Age/model not important as long as endlinks fit properly.
There a nice thread on these watches here; perhaps someone in that thread can help? https://omegaforums.net/threads/vintage-tissot.63179
Do you have a picture and or details of these bracelets? I remember seeing a Tissot bracelet in the parts bin of my local watchmaker, but I know nothing about the brand.