Connector is a very useful tool to keep 2 shapes or components in your drawing connected.
In Vecta, you can switch between straight line connector and Z connector to create different variations of connector. You can access them at the toolbar on top, or use the shortcut key Ctrl / Cmd + 6.
To connect 2 shapes, just select connector, then click on the first shape and drag to the second shape.
When you have the Z connector created, you can drag its handle to different direction to create different variations of connector.