Halloween Dress

I bought this really cool Halloween costume. But I do not know how to attach the wings to the dress. It does not tell you how to dress and not a special place where you can put the wings in. The wings are two straw tubes with black cloth hanging to it. Help please! Glue and videos will not work.

Could tie straps for them, they loop over your shoulders. As a backpack.

Or sew them, they are light enough.

I safety pin or the other when they are. Maybe make a second faster with needle and thread.