EXEC master.dbo.sp_addlinkedserver @server = N'SERVER\DEV', @srvproduct=N'SQL Server'
GO
OR lets say your 'SERVER\DEV' has a private IP '192.168.0.100' and listening port '1115'
EXEC master.dbo.sp_addlinkedserver @server = N'192.168.0.100,1115', @srvproduct=N'SQL Server'
GO
(use comma between IP and port number)