Koos,
By default it should try to find the ZD. If it can't over the wired connection and meshing is (correctly) configured, it will connect to the ZD over the mesh.
That is, of course when it is part of the mesh and can 'see' at least one other AP in the mesh.
Meshes need to be designed correctly though.. it's not just a 'tick box to enable'.
Groeten,
Bas