Physical connections are always applied between a port on one object and a port on another object. When a physical connection is created by the assembly connection rules or a feature, those two ports are specifically identified.
For example, the definition of a connected slot contains a physical connection between the web left face port of the profile and the edge port of the plate that has been cut by the slot.
When the slot cuts through the plate, a series of small ports are formed on the plate. Each of those small ports takes the name of the slot segment that cut it. The Web_Left cutting line on the slot applies the name Web_Left to a port on the plate edge. The physical connection is applied between these small, named ports.
In the connected slot example, a physical connection is created as a child of the slot in the connected definition class of the slot rules, using the following code: