This HDL6628 Board is basically an adapter board which is use for communication between computer and Smart Screen. 10 Pin FFC / FPC cable.
10 pin interface
As shown in the above figure One-end of the different side FCC row line is connected to terminal block of the screen, and the other end is connected to the DWIN HDL662B adapter board, both blue side face up. One-end of the double-male USB cable is connected to the adapter board, and the other end is connected to the computer for communication.
1 x USB to FCC 10Pin 1.0mm adapter board HDL662B