Select the 'Wire New Auxiliary' button from the Linear Draft toolbar.
The 'Configure Auxiliary System' form will be displayed.
Choose the type of auxiliary wire from the drop down menu and name the wire. Click 'Confirm' to continue.
The 'Choose a Structure' form will be displayed.
Select a structure from the drop down menu or click 'Locate' and follow the prompts to select a structure from within your model.
The 'Configure Wire' form will be displayed.
Edit the fields to suit your project needs and click 'Confirm' to accept. Full instructions on adding equipment can be located here.