Could you clarify if refers to this shower hardware or a different type of product, such as a B&D garage door component?
If you are using the contents of the .rar to install the unit, ensure you follow these general plumbing steps often found in such guides:
: The main control unit that sits behind the wall.
Con.Push Button Valve,Slide Rail Kit,Outlet Elbow ... - Eastbrook
: The connection point where the water feed meets the shower hose. Installation Best Practices
: Use a utility like WinRAR or 7-Zip to unpack the .rar folder.
: Test all connections for leaks before the final wall closure. Handling the .rar File