yes sure. I also realised that there is no OMV documentation for this setup. So I thought someone who has done it might see this here. I dont think it is very difficult but my trial and error only gave me one way connectivity. I also think, apart from a single Peer-server setup this site to site is the most common use case. Its the easiest way to create a virtual network with two separate physical locations.
I mean I can add details of each server to the other side's config but I don't think they will end up on the same subnet. Thats my issue. I dont want two separate subnets.
Of course, if I find the solution I will add it here.
thanks