Level Streams & Tiled Map

We recently moved from a single world map to a multiple tiled world map - 1 level to 16 small tiled levels (which make up the same map).
Prior to the cut over we had level streams setup on different locations where the towns and cities we made were.
Now that we have the tiles in place and working I’d like to move the old level streams containing structures pertinent to a specific areas and place them onto the tiles in the same general area.

Is this possible? If so, how exactly can I accomplish this?

Thank you in advance