EC200U UART Issue

Hello Everyone,
Please tell me where the UART2 and UART3 (Pins) of EC200U are Exactly Located.

Because I’m able to communicate with Main UART (UART 1) but I’m not able to communicate with UART 2 & 3.

Even though I short the GPIO Pins to the UART 1 as mentioned in the documents and to connect UART 2 with the COM (UART1). And for the UART 3, I’m using the debug port but still, I cant communicate with UART 2 & 3. I used the Set function in the program for the UART 2 & 3 Communication.