Connectors cannot be placed on products directly. They are used by means of connector references, which may be placed on products. Multiple connector references may reference the same connector.

A connector reference has the following attributes:

• Reference – A reference to a connector, made by means of the connector’s code.
• Placement – Describes the location and orientation of the connector, in relation to its zero-point. The location component of the placement, is described as a 3 dimensional coordinate, whose units are the same as the units set for the project. The orientation component of the placement is described as a rotation vector and a rotation angle. The rotation vector describes a vector by which the connector is rotated about. The rotation angle describes the magnitude of the rotation about the rotation vector, given in degrees.