In the new opened wizard document:

• Possibility to define the positioning rule. Position your element with the different constraints from the Assembly tab (used destination geometries from this document wile be those asked when inserting the part/assembly in an assembly).

• The Tools > Rules... command allows to define dimensioning rules allowing to automatically select a family instance during inserting it in an assembly.

Constrains defined in the Assistant document must use publishings instead of the geometry.