If you are using the built-in switchboard created by the Access
Switchboard Manager, you need to first create either a code Module or
a Macro that opens the query. Then you can use the switchboard manager
to call the code or the macro in the manager's edit switchboard
dialog.
If you are using your own unbound form as a switchboard, simply add a
command button and code it's click event:
DoCmd.OpenQuery "QueryName"