I have 2 Tp-Link C9 routers, the root one is al set and working, ssid is "MainSSID" and hardware version is 5

Then I create a WDS bridge using the slave router (C9 Hardware version 1), this one has 2 SSIDs, the one of its own "SlaveSSID" and then the one that it is repeating "MainSSID".

When all is done I can see both SSIDs exploring the WiFi networks at home with my smartphone.

The question is what SSID should I use with my SmartTV ? I see 2 with the same name "MainSSID" I thought I should see just one and the smartv would use it "smartly" without my intervention.

I know I am doing something wrong but I can't determine what.

Can some caritative soul help me with this?