How to BMW ICOM A2+B+C connected correctly?

Everyone is Rika of Jobd2 today. It's shared today how to do connect BMW ICOM A2+B+C correctly.
BMW ICOM A2+B+C is a strong OEM diagnostic system of BMW vehicle model storage. But a connection of a mistake causes an unnecessary problem. A connection of BMW ICOM diagnostic tool is explained in detail here.
First BMW ICOM A2+B+C accessary is displayed, as follows:.
ICOM A
ICOM B
ICOM C
A LAN Cable.
Laptop or computer
How is BMW ICOM A2+B+C connected correctly?
In nothingness SHI with with WIFI and WIFI, to connect, a picture, as follows.
The connection explanation was written on this formal website conversantly.ThisPass and please have!