Mark,
This Astro baby site for collimation is pretty good
I’m sure you can set your secondary from these instructions
The main thing is to ensure you have a concentric donut ring and can see the 3 clips and that the distance is even all the way around when you view down the OTA to the primary mirror
The orientation of your secondary mirror must positioned correctly with respect to the end of the focuser tube and OTA , the Astro baby site shows you this
https://www.astro-baby.com/astrobaby...ian-reflector/
Hope this helps
Martin