How to connect this LG G8X Dual Screen motherboard to PC and install Firmware (STM32F411)

[hey_sdk]

This is the basic idea, but now the dual-screen is bricked.

Here is a Detail reading link to that - XDA Forums - LG G8X

I need to know how to connect this Dual Screen motherboard to a Computer and install

custom firmware on it.

Please Help.

-SDK