Connector elements are very general purpose links between two nodes (or a single node and ground) in a model. Mechanism analysis is an obvious use of connector elements, joints and links are abstracted to a convenient mathematical formulation based upon allowed relative motions between the nodes of the connector. This can be  further augmented by assigning properties to those connections, they could include, perhaps, damping, friction, elasticity etc. Such analyses allow engineers to study motion and force relationships, possibly optimising link geometry to achieve kinematic targets.

Mechanism models can be enhanced by replacing the rigid links with meshed bodies - multi-body dynamics simulations are now possible. Non-linear effects can be included, along with complex material responses. This multi-physics simulation couples the power of the finite element method with the flexibility of the connector definitions to provide a more realistic solution.

These two techniques are well known, however, the very general description of connector elements means they can be used for other purposes! The attached document, written by Stephen King from the UK CSE, shows how they can be used to model the system which connectors high voltage power cables to the supports.

It would be computational inefficient to model the connections using contact and traditional elements. Instead they are abstracted to a two noded connector element which captures the physics of the connection accurately.

Please enjoy the attached document!!