ISO/TS 10303-1729:2018-11 specifies the application module for
Physical unit interconnect definition.

The following are within the scope of
ISO/TS 10303-1729:2018-11:

• identification of the connectors that are mated in an assembly where those
  connectors are in the usage view of components in that assembly;
• items within the scope of application module Part occurrence, ISO/TS 10303-1715.