Mwan3 with openvpn

I want to use 2 different internet connections over wifi using mwan3. They are both quite slow individually, but I want to make the best of it.
Also I currently configured my repeater to route all internet access over a vpn provider.

How would I combine this?
Do I need 2 individual VPN connections, each one statically connected to one of the interfaces/wifi-connections. And configure the mwan3 to load balance between the VPN interfaces and ignore the other interfaces?