Hello,
After several months of research I finally found the impasse where were shot the scenes of 51'14 '' to 51'39 '' then 53'23 '' to 54'00 '' in a small street of the The episode "Short fuse" of 1972. It is true that the places have changed greatly hence the difficulties to find this place. If anyone is interested in the filming locations I will be happy to give them the results of my research. Cordially.