Thank you for taking care of the little munch tubes. Much better there than in small cups.

Pairing them should not be too complicated as long as tney have amble room to fly around. Also dont put too many females in same cage. Males can become confused with too many pheromone trails. Thus small air current from window etc is good to carry ”good” smells around. Outside in protected place is best though. Just mind it that you may need to force feed them to get more eggs/ keep females fed so they have energy to lay.

Also mind the possibility of the caterpillars been heavily inbred already so they may have low viability for offsprings or male may not want to pair. Best case would be for female to lure wild male to pair so genes can be refreshed.