what kind of convenience? you have too many snakes and not enough enclosures? you did not have time to clean an enclosure, so u put them together? did this great big enclosure have multiple warmspots? they're BP's. they're not the most active snakes but they will find their way to and compete over the warmspot; or find their way to each other sooner than u think.
you're just lucky that no harm came to you or your snakes.