Budgie breeding help ASAP!?

if got an aviary and 3 pairs of budgie i have colony boxes for 2 pair in the flight and one pair in a breeding cage in the aviary outside of the flight with a breeding box inside i have been watching the hen go in and out of the nest box and move the shavings around and i have seen the male in their once they have been in the breeding cage toghther for 5 days and but they were alredy paired up they have all of the right things to mate and how do i know when they will lay eggs or even mate or any other info please?