The connection point must be present in all assembly variations in the same part.

We can only use the configurations (*_asmcfg.prj), not the assembly tables.

The assembly has to be self constructing.

This means, in the Rule properties dialog box the Always build automatically option must be set in every rule in an assembly.

(It is not possible to use the "normal" automatic build.)

In the Part properties dialog box the Hide table checkbox has to be activated for all parts except the dummy part.

All variables have to be controlled by a main table.

(similar to assembly table project, see nnpath below)