SQL Server 2014 :: Add A Step To Add To Encrypt Backup

I have inherited a job that is calling a maintenance plan. The maintenace plan makes a back-up of various databases.I have to add a step to add to encrypt the backup. I have the exe already. Its called "EncryptBackup.exe".My difficulty is I do not know how to add the step to the job exactly. The command syntax eludes me a bit. The syntax for the encrypter exe is:

C:exesEncryptBackup.exe C:DBBackupFolderA Encypt filename.bak

The output is "filename_encrypt.bak". It should be noted that there exists several sub-folder off: C:DBBackup like FolderA, FolderB, etc...each one holds a database.