WelcomePrompt_CustomMessage not visible on Installation Welcome?

Greetings,

I’m trying to add the message to the installation welcome that it should take about 20 minutes once started.
I’ve tried modifying the EN value for the welcome prompt but it’s not displaying.

	<WelcomePrompt_CustomMessage>This update should take about 20 minutes once started.</WelcomePrompt_CustomMessage>

After digging through the active variables, I figured out I could more or less get what I needed by overriding the defer prompt message.

$configDeferPromptWelcomeMessage = (
“Whatever text I want here”
)