To configure the FMS, open the file "connection.php" in the includes folder.
You will see this line: $pdo = new PDO('mysql:host=localhost;dbname=fms', 'root', '');
This is your database, to configure it properly, reference is below:
host=localhost; : this is the adress your mySQL database is hosted on. For example, localhost
dbname=fms : this is your database's name. For example, fms.
'root', '' : this is your database's username and password, For example, 'root' is the username, and '' is the password