How to create new Connector

I need to create new Google Apps Connector, because some limitation of existing one, but there are no Connectors documentation for SugarCRM 7.7, while it exists for SugarCRM 6.7, so I am wondering if this documentation still valid(I noticed that all files mentioned in docs exists in 7.7) and if I can use it as eferences and example for creating Connector for Sugar 7.7