I can not answer your question directly but in general when traveling I try to remove any all metal that might set off the WTMD. I go through the WTMD with two medically necessary items with metal, my glasses and my wedding ring.

That said my initial response is that the cuffs are small enough that like the metal zipper or buttons on trousers are small they should not alarm the WTMD. But you never know how sensitive they might set it at.

As such, I would just remove them and secure them in my carry on like I do with my watch.