I'm assuming this is done by removing the one nut on the outside of the housing?
I did install a new cable the old was not broken, I attached to the speedo and spun the cable by hand and watched speedo move so my guess is transmission side
Restored by me. Not a professional. Restaurant worker by trade. YouTube forums and some trial and error built this beauty. Sheet metal replacement. Body work. Paint. Rear gears. Interior. And engine. ALL ME. Toot toot