This article show a guide on how to update MB SDconnect firmware,it can not only apply for original and Chinese SDconnect clone version.
Update your SDconnect firmware
Locate the SDconnect Toolkit folder and make a backup for “update_special_a” folder
Note:Before you start update you SDconnect firmware,you need to exit SDconnect software
Here “update_manual” folder is my backup folder for “update_special_a”
Run SDnetControl,select “Configuration”–>”MUX”–>”Software update”
Note:If it prompt you “SDconnect battery voltage too low (645)”,because it must be around 14 volts,and you must connect the battery charger and one more thing,the 6AA batteries must be installed as wll.
Like this your SDconnect will update with no worry
Even if its Chinese clone version