There is a shuttle service to Brussels-Midi station (more convenient than other means of transport), which takes 45 minutes. You can book or consult the timetable on the following link: www.flibco.com
You can also buy tickets directly from their office (just after the arrival gate on your right) or from the bus driver's stand. Tip: buy a return ticket directly, it's cheaper! Then follow the directions "From Gare du Midi".
DOWNTOWN
From the Grand Place : Bus 48 Decroly - "Rochefort" stop - Cross the roundabout to avenue Wiellemans Cuppens, then 2nd right.
From Louise: Streetcar 97 Dieweg - "Berthelot" stop - Go back in the direction of the streetcar, take the 2nd left.
Cabs: 10mn / €15-20
BY CAR
Anneau de Bruxelles, exit 17, direction Centre
Then follow the "WIELS" sign until you come to a set of traffic lights at a large crossroads with streetcar lines, the Wiels museum on the left and Fortisbank on the right.
Go straight ahead on avenue Wiellemans Cuppens until you reach the traffic circle. Make a U-turn to return to the avenue in the opposite direction, then turn 2nd right.