Expandable table view cell in xcode: how can I add text labels for the user to edit?

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iOS

Xcode

Swift

I am fairly new to Xcode and Swift, but am trying to create an app. My goal is that I have an Expandable/Collapse TableView. The expandable cell (the subcell of the main cell) will have 2 text fields (one on the right and one on the left) where the user can input information using the keyboard. I am wondering how do I go about inserting 2 text labels and on the expandable cells, and having the user edit these. I am having trouble because I was following along in a video where I was coding most of the elements instead of dragging pieces into my storyboard. I have already created the expandable table view. Thank You!

What I have tried:

Looking through as many videos as I can to find an answer.