RDS 2012 external connector license (ECL)

I have an existing RDS License server (Win2012) which has a # of RDS Per user CALs.  We just brought an ECL.  I am very confused on how to install this new license to the existing license server.  Am i suppose to go into the RD Licensing Manager, right click the server on the left pane and select "Install Licenses".  

Thanks for any help you can provide.