add node to VCS for SQL

Hello

   Currently , I have 2 node cluser for SQL database.

There are requirement to add new node to the existing cluster.

If I install windows  , sql installation &  configuration as same as the exsing nodes.

The finally step are just adding the node to cluster and re-run the SQL agent configuration wizard to reconfigure the SQL service group.

I am not sure about the additional step that must be concern.

Thank you.