This red path – which begins at Avenue Franklin Roosevelt and ends at Rue de Pinchart – actually goes two different ways, instead of one. In the woods, it separates into two different pathways.

When walking on this trail – with Avenue Franklin Roosevelt in the back and Rue de Pinchart in the front – the path does go left (as correctly indicated on the map), but at one point it also goes right and runs along the buildings/houses "43" and "41". 

That path starts from where I placed the pin and it ends at the pedestrian crossing that leads to the beginning of Avenue Christophe Plantin (see on Google Maps: https://maps.app.goo.gl/tKCztDw6tgj2jR9F7). There's a small blue "link" on the map, that's where the path ends. Not sure if there's a way for people like me to trace it. Hopefully I explained it well enough, apologies if not...

I regularly walk this trail to reach the bus stop located in Avenue Christophe Plantin (which I made a note to create it, because it's also missing on the map). It's a shortcut to it. It's relatively new, it was created 2 or 3 years ago maybe.