Manual Multiple_TE_VPLS on the wiki

https://wiki.mikrotik.com/wiki/Manual:Multiple_TE_VPLS

When I view this tutorial. I wonder where I have to connect the network cables.
This tutorial is about 4 routers. How do you connect these together?

Where should the WAN be connected? etc.

Ethernet1 goes to …? Ether2 goes to …? Where is the Wan connection?
Why are these tutorials never complete and clear.
Can someone help me please?
Thanks

Hi

You can determine that based on the ip-ranges. 192.168.33.1/30 & 192.168.33.2/30 in same range => these are connected.

Thanks for your reply but it don’t work.
BGP is also not established.

First of all you should fully connected ospf domain(in single area), then establish bgp. Start with that.