Hustler hide their wiring diagrams in the parts book. down the end of chapter 5.
The book is a free download form Hustler
Down side is they run across two pages so you need to print them out then join them together
All of the super Z are in the same book and there are a lot of variations.
If you are really lucky some one like Mechanic Mark, who searches soooo much better than I will drop in a link to the page.
We have pathetic internet down here is OZ