Main site install to sub folder home directory

I want install one site on a sub directory of the defined home directory
something i can achieve in this way if i modify apache conf file in this way on a standard LAMP install

< VirtualHost *:80>
     ServerAdmin admin@example. com
     DocumentRoot /var/www/html/subdit01/subdir02
     ServerName example. com
     ServerAlias www.example. com

     < Directory /var/www/html/subdit01/subdir02>
        Options +FollowSymlinks
        AllowOverride All
        Require all granted
     < /Directory>

     ErrorLog ${APACHE_LOG_DIR}/error.log
     CustomLog ${APACHE_LOG_DIR}/access.log combined

< /VirtualHost>

how i can do it under virtualdmin to have my exemple. com pointing to
by default?