OK - I tried to attach a Word document which has excellent pictures and step-by-step disassembly instructions. Unfortunately the forum doesn't allow upload of Word documents.
So I then converted it to a pdf file, but got the forum message that I can't upload a file over 200K.
The original Word document was created by Clive Elsdon in Australia. It's *excellent* for detail on the innards of the steering column control head assembly.
Here's a link to a page full of tech goodies:
https://www.tr-register.com.au/files/technical.htm
Scroll down to the "Disassembling the Control Head in the steering column" section. You can get the full Word document there.
Hope this helps. If you have any problem getting the file, let me know your email address and I'll send it.
Tom