How do I attach the Trionic rollator seat base to the frame?

It can be hard to get the reattachment of the base seat right if you have removed it for some reason. 

Attachment of rear nylon bands with Velcro sections:

NOTE: The picture shows the 'cut-section' of buckles.

Attachment of front nylon bands with Velcro sections:

NOTE: The picture shows the right-side attachment, seen from the rear (walking position).