Hi all
Here I am.
Slight improvement after cleaning all identified contacts on the starter circuitry.
Sand paper of everything, including removing the RR wheel to access frame battery strap, and all positive including solenoid starter. It seems I don't have a starter relay, and I still don't have identified the chassis engine block earth strap. However it exists somewhere as negative circuit is effective????
Starting ok after 10 sec cranking with 5°C... still not perfect but does the job...