I´ve got a 60CT-4, but my manual is written in german. The Mecatwin 60-40 is an auxiliary flash with it's own capacitor. I wonder what controls are not clear to you. I would be glad to help, if you can ask more specifically.
You can find the Metz website under: http://www.metz.de/en/photo_electron...blitz.138.html. There is a contact option in the menu. Unfortunately, the manual for the 60 series is not availiable online.