How to use Quick Set with dual radio?

RouterOS Beginner Basics
1

I have just got a SXT Lite5 ac and it’s got a 2.4 radio as well as a 5. Not sure why the 2.4 is useful, but the QuickSet system seems to only setup 2.4, and I can’t see how to make it select the other (main) radio.

Any suggestions as to what I’m missing?

2

Better not to use quickset at all if you are able to learn basic networking things.