btw, for anyone out there;
if you'll like to turn this openvpn into a service inside CentOS; simply use
sudo systemctl -f enable openvpn@newclient.service
Then you may access it from /usr/lib/systemd/system
then you vi/nano openvpn@newclient.service
From there, you use
--config <the location of your config file> i.e. /etc/openvpn/client.conf and other advanced settings