The colony is were the queen is and where she is laying brood. she seldom comes out and by the time she will, the trap out nuc will have made their own queen so there is little chance of her entering the new colony.
I can tell by your questions and posts that you know what needs to be done but are trying to get to the end results with out going threw all the work that is involved to get the job done.
Get at it, take your time, stay calm, you have removed the guard bees and the old forager force, so the bees that are left in the duck box are young, and will be a lot less aggressive. Doing a cut out is to fine of work to try doing it with bee gloves on so loose them Go bare handed or use nitrate dish washing gloves. Move the duck box away from the trap out nuc, any bees in the DB are young and have not orientated yet so they will stay with the queen and brood that you have moved into a nuc.
Welcome to the forum