connman.md: Add connection workflow

Author: devlaf

src/config/network/connman.md

@@ -15,11 +15,28 @@ Finally, enable the `connmand` service.
 
 ## Configuring ConnMan
 
+### ConnMan CLI
+
 The `connman` package includes a command line tool,
 [connmanctl(1)](https://man.voidlinux.org/connmanctl.1) to control network
 settings. If you do not provide any commands, `connmanctl` starts as an
 interactive shell.
 
+Establishing a connection to an access point using the `connmanctl` interactive
+shell might look as follows:
+
+```
+# connmanctl
+> enable wifi
+> agent on
+> scan wifi
+> services
+> connect wifi_<uniqueid>
+> exit
+```
+
+### ConnMan Front-End Tools
+
 There are many other front-ends to ConnMan, including `connman-ui` for system
 trays, `connman-gtk` for GTK, `cmst` for QT and `connman-ncurses` for ncurses
 based UI.