How to install back to wall - Dual flush mechanism PLUS with 2 buttons Roca cisterns | Roca

How to install dual flush mechanism PLUS (A822505500, A822505502) for Roca cisterns with 2 buttons for Back to wall cisterns
www.export.roca.com/products/...
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Cómo instalar mecanismo cisterna Roca (A822505500, A822505502) de doble descarga PLUS con dos pulsadores en cisterna con fijaciones escondidas
www.roca.es/productos/mecanis...

[@srdegaming_Srd]

Buenas tardes, en el producto que acabo de comprar, el pulsador viene unido a la parte que tiene que hacer rosca (7a) y no encuentro la manera de desenroscarlo

[@ZoltanGyulai1965]

Shame I cant find videos relating to part number. I bought a kit and how should I know whats the product name? Lousy manual even more lous catalog of the videos

[@jose811219]

Good video, but I installed a new one and it has leakage. I don't like it