All VIs have a connector pane. The connector pane selects the front panel controls and indicators to expose for wiring connections when the VI is used as a sub-VI.
The LabView help has a wealth of information to help you get started programming in LabView. From any LabView VI window, goto Help >> VI, Function, & How-To Help... >> Contents. Work through topics like Getting Started. Your specific question is discussed in Creating VIs and SubVIs >> Icon and Connector Pane Overview.
You can view the connector pane of any VI by right-clicking on the VI's icon in the upper right corner of the front panel window (at the right end of the toolbar) and selecting Show Connector. By default for new VIs, there will be an empty connector terminal for all front panel controls a
nd indicators. To assign a connection, use the wiring tool and click on the connector terminal, then on the control or indicator you want to assign to it.
Use the LabView help. It's the best way to get started and it's a great reference even for experts.
