I want to cuff my daughter to her bed
What is your reason for wanting to cuff your daughter to her bed?
So she wakes up after 12 o'clock.
It is absolutely wrong to restrain your kid without their consent, just for your own benefit. You should stop doing that and consider therapy if you already did. Tell your child a story if you want them to sleep tight.
It's not like a finger or something, it's just a pair of handcuffs, I'm not trying to do anything bad.
Putting handcuffs on your daughter is very wrong in many ways. I hope you understand how this would be a huge red flag for anyone who may find out about this. In addition to that, your daughter most likely is not going to enjoy having this done to her.