You'll have to copy your post yourself. Just go to the thread and post. If you want to save some effort, you could click on the button with a pen on you opening post. It'll open the edit post screen. You can copy the whole text so you'll get the link and any other markup with you. Then you can paste that as a new post in the correct thread.
We can move threads from one subforum to another, and we can edit anyone's posts, but we can't actually move posts from one thread to another. The best we could do is edit your post and copy-paste the text in the correct place, but it would be posted under the mod's handle.
I'm locking this as a duplicate.
Quod gratis asseritur, gratis negatur.