T-SQL query to find backup folder for specific maintenance plan
You can use the available views in msdb to find the information regarding backups :


dbo.backupset:  provides information concerning the most-granular details of the backup process
dbo.backupmediafamily:  provides metadata for the physical backup files as they relate to backup sets.
dbo.backupfile: this system view provides the most-granular information for the physical backup files


You can use below T-SQL code to list down all required info:

    SELECT  
    CONVERT(CHAR(100), SERVERPROPERTY('Servername')) AS Server, 
    msdb.dbo.backupset.database_name,  
    msdb.dbo.backupset.backup_start_date,  
    msdb.dbo.backupset.backup_finish_date, 
    msdb.dbo.backupset.expiration_date, 
    CASE msdb..backupset.type  
    WHEN 'D' THEN 'Database'  
    WHEN 'L' THEN 'Log'  
    END AS backup_type,  
    msdb.dbo.backupset.backup_size,  
    msdb.dbo.backupmediafamily.logical_device_name,  
    msdb.dbo.backupmediafamily.physical_device_name,   
    msdb.dbo.backupset.name AS backupset_name, 
    msdb.dbo.backupset.description 
    FROM   msdb.dbo.backupmediafamily  
    INNER JOIN msdb.dbo.backupset ON msdb.dbo.backupmediafamily.media_set_id =    msdb.dbo.backupset.media_set_id 
    WHERE  (CONVERT(datetime, msdb.dbo.backupset.backup_start_date, 102) &gt;= GETDATE() - 1)  
    ORDER BY  
    msdb.dbo.backupset.database_name, 
    msdb.dbo.backupset.backup_finish_date