How to set up Tenda Nova mesh for wired backhaul - MW5, MW6, etc.

[Babayaga79]

I think the only way this will work is by placing the primary node in-between the ISP router and the LAN switch, i.e. connect port 4 of the router to the WAN port of the primary node and the LAN port of the the Primary node to the switch.

All secondary nodes in the other rooms must connect back to the switch.

The other wall sockets connecting your TV, PS5, etc. can connect to either the ISP router or the switch. 

I also suggest turning on the secondary nodes one at a time, ensuring it shows the <--> status in the Tenda App before powering on the next secondary node.  This will help rule out any backhaul issue such as a faulty cable, wall socket, etc.

Thank you!!!
I’ll give it a try.
Just to be sure: my config is in bridge mode, ok?

EDIT:
I've reset to factory all nodes, checked cables and wall sockets with a tester to avoid any problem with them, then I re-configured the primary and one secondary node to wired backhaul, and I think it's done (see images below).
The other secondary node is away from a wall socket so I connected it wireless, do you think it will cause problems to the net ?