Back in the 1980's I made up some stainless steel front mudguard centre support brackets and a front brake torque arm for my 1966 A65 Lightning, photo attached so that you can see what I am talking about.
My bike has the 6 tab front mudguard and all of these 'DIY' parts were made using the originals as patterns, so I'm happy they are dimensionally correct and they all fitted perfectly when the bike was rebuilt way back then.
During my recent strip down of the bike, for it's restoration Mk2, I was a little over enthusiastic to get it into bits and forgot to take note of how these particular parts were orientated on the front forks.
As far as I can see and from what I have been able to find out the stepped mudguard support brackets fit against the lugs on the fork slider tubes and the torque stay arm fits inside them. That's inside as in towards the centre of the forks and wheel.
I can also see that the stepped mudguard brackets can be fitted in three different ways and I have attached a photo of a CAD drawing showing these options A, B & C. The drawing is not exactly to scale and is only intended to show the three different ways that the mudguard centre brackets can be positioned. I think all of these positions would work, dimensionally, but which one is actually correct and how the factory fitted them?
Does anyone know? I can't find any photos of the bikes that show these brackets in enough detail for me to tell?