'How do I make a simple Modular Large complication on watchOS?

I'm hoping to build a Modular Large complication that will display two strings - a static one and another one that gets decided in code.

The complication will only support the large size in the centre of the Modular face, and others like that.

I program in Swift and use Storyboards (have next to no experience with SwiftUI).

How do I get this accomplished?

Thanks!

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Solution	Source