Place them in /storage/openvpn/
Create a file named openvpn.service
in /storage/.config/system.d/
with this content :
[Unit]
Description=OpenVPN Autorun Service
After=network-online.target
Requires=network-online.service
[Service]
WorkingDirectory=/storage/openvpn
Type=forking
ExecStart=/usr/sbin/openvpn --daemon --config /storage/openvpn/your_config_file.ovpn
TimeoutStopSec=1
Restart=always
RestartSec=2
StartLimitInterval=0
[Install]
WantedBy=multi-user.target
systemctl enable MYOPENVPN.service