Trouble transferring rekordbox playlists/metadata/database

Got a new pc, I just took one of my hdds from the old computer and put it in the new computer. I thought I'd be able to find the playlist/cue data somewhere in the folder where rekordbox was installed (which is on this hdd which I've moved). Can't seem to find anything though. I've got the same music library on this computer, but I've lost all my rekordbox playlists and such. Is there a way to find that information in the old installation folder?

Bit confusing, hope that makes sense.

Thanks