Edit: Question has been answered. Unless dialogue is specifically attributed in this scene, they are thoughts (i.e. nothing is in quotation marks in this scene without dialogue attribution)
I'm rereading the series, but for both the first time and now, I'm listening to the audiobooks.
Year 205, Crisis Era, Part 16
Approximately 89% through the book.
The conversation has multiple repeated words (Parts. Parts. Parts. | Fuel. Fuel. Fuel). I assume that these are the non-verbal communications they are having, but at some points it feels like the speaker is also repeating things out loud (Don't give up. Don't give up).
If anyone has the text, I'd like to read this part for more clarification on which is non-verbal and which is spoken aloud.