I used to have one of these, its a Motobecane with a different badge but you'll not find any spares in this country.
There is a Motobecane club in France worth joining.
Ebay.Fr cna be fruitful.
I have a book covering Motobecane/Peugeot/Terrot bikes from the 1950s
"Les Motos Populaires Francaises" by Patrick Negro has a lot of the info you need, I want 30 quid for it. PM me if you want it. Might have other stuff.
The book is quite detailed with wiring diagrams, road tests, pics, history, expolded diagrams, even signed by the author, as I bought it form him 2001.
I hope you speak read and write decent french because otherwise you will have a hard time.
There never was a manual, look on line for RTM magazine for tech articles.
If you look for the threads re french bikes on here you will find contacts for three french dealers about the only sources of new parts for the bike; mostly quite helpful.
I had to go to France for most parts.