"just one of the 18 charges relate to computer intrusion and it carries just 5 years' jail, compared to the 175 years Assange faces if the maximum sentence was awarded."
The case is then clearly about 170 years worth of charges, not about hacking (the rest 5 years). And these charges are all the "Espionage Act" charges for a non-US person doing obviously a journalistic work outside of the US.
Independently of that, in the article is, among other topics, a described testimony about the chronology of how the unredacted documents became public and a reference to the article:
https://shadowproof.com/2020/09/21/trump-schwartz-grenell-wi...
Which (a bit chaotically) describes the testimony of Cassandra Fairbanks about what she knows happened in or around White House related to Assange. Interestingly:
"The prosecution did not object to the truth of the matter asserted — that Trump officials were directly involved in plans against Assange."