How did he manage to kidnap the goddesses? Well, he gassed them like he did

to Shampoo.

Surprising a goddess is not an easy feat for a mortal, even one like this
guy appears to be. You've got quite some explaining to do.
Supposing that the goddesses were REALLY unawares to the point of being
caught like that. Unless the man was of a supernatural origin, and a very
powerful one to overpower the goddesses, there's no possibility that he can
hold them after they wake up. Their telekenisis can can loosen any bonds,
open any doors, and if that fails there's Skuld.
And as for covering their origins from the other hostages, they'll be too
grateful to notice or care.
I'd love to see how you plan to worm your way out of this one.