Scw-ovpn limit ? can't fully configure openVPN server


I am using an instance from the official image “Scaleway OpenVPN”.
That works fine for a basic use, but when I want to configure the OpenVPN server with more advanced setting, I can’t do more…
I want to associate static IP to some client ID (and customize DNS use).
There are solutions in the official OpenVPN wiki (, but I can’t find all file to configure the scw-openvpn server.
I my case, the network topology is “subnet”.

Does the only file to configure is /etc/openvpn/ ?
(and “you should restart setup-unbound first, then unbound , or restart your server”)

I didn’t find this kind of information on the SCW-OVPN help:

Thank for your help.