Puffer,
You can glue them, but there is a chance that they slime up and the glue does not stick.
You can use bridal viel or netting and cover the coral and rubble and they will attach.
You can sew them on.
You can glue a plastic toothpick to the rock and stick them on the toothpick.
You can let them be and hope for many to attach themselves.
You can loosely rubberband them to the rocks. Tight rubberbands just frag them again! LOL
There are many ways.
In a healthy system, I would do a water change due to the chemicals they are releasing and double your carbon as you fragged quite a bit.
If water quality stays on the good side, you will be attached in less than 10 days or sooner.
Hope this helps Jen,
Rich