Where is SQL Configuration Manager in Windows 10?

In later versions of SQL Server, the configuration manager is implemented as an MMC plugin.

There are two ways of accessing this:

1. Navigate to c:\windows\system32 and look for a file with the name SQLServerManagernn.msc, where nn is the version of SQL Server you have installed. For SQLServer 2014, the name is SQLServerManager12.msc. You can double-click on it and you'll see a result. You can also make a shortcut on the desktop if you like.
2. A much simpler way is to run the Computer Management applet from Control Panel→Administrative Tools→Computer Management, where you should find the configuration manager installed

check this microsoft doc page for sql server configuration manager.
snippet (Feb 2018):

SQL Server 2017     C:\Windows\SysWOW64\SQLServerManager14.msc
SQL Server 2016     C:\Windows\SysWOW64\SQLServerManager13.msc
SQL Server 2014     C:\Windows\SysWOW64\SQLServerManager12.msc
SQL Server 2012     C:\Windows\SysWOW64\SQLServerManager11.msc