How do I connect a Nintendo GameCube to a Roku TV using these things?

The Game Room
1

I have an SNES RF switch that connects to the antenna in part of the Roku TV, and an adaptor that allows me to connect it to the back of the GameCube. I don’t have the red, yellow, and white cords that allowed me to plug my sister’s GameCube into the Roku TV.

Is that what I need? Or can I get by with my new setup?

2

Probably best with the red/yellow/white cord. I see them on EBAY and Amazon for about $7. If you need something faster and want to pay a few bucks more your local Gamestop may have used ones.