Hi If you place system library it should contain 3D model, if still lack of step, please tell us the part number; if your PCB was imported from Std, you need to re-binding the 3D model at 3D Model Manager the plug and connector, we only draw the real product 3D model now, doesn't contain other parts

With plug, I mean the housing. Each connector consists of two parts: the connector on the PCB, the pluggable housing. Since step consists of individual parts one can quickly delete it if it isn't required. On the other hand, it being included saves a lot of time. **example**. how it is at the moment:  What it should look like: 

@xenons Yes, I got your point, we will think about your suggestion, thanks