Bean,
Got it. Anyway, I maybe got it
Here's some info about an MG with the lever arm shocks. The picture about 1/2 way down the page seems to show a similar setup to your picture:
https://mgdriving.com/2021/09/18/rep...dont-tell-you/
Even though you have the tube shock, the end of the arm looks quite similar unless there's something your photo doesn't show...
Still trying to help,
Tom
PS: Just found a bunch of old links that may be useful:
MGB Front Suspension
Be aware it's a very old list so some may not be there any more, and some pages may not exist, so you'll have to try each main web site to see what's there now...