Using nRF52833 DK to connect at RDM6300 module using uart

Hi

I need to connect the nrf52833 DK with the RMD6300 module using the uart. I am using the SDK 2.5.1
For this, I taked the example "C:\ncs\v2.5.1\nrf\samples\bluetooth\peripheral_uart".
The example is working, when I send the data from COM6 using the VCOM (docklight) I received the text in the nRF Connect app througt BLE, in my fone. When I send a text from the app nRF Connet , I received the text or message en the docklight (com 6).

Now I need connect the 52833DK with the RDM6300 module ,this module has an output ping (Tx - TTL 3.3V ).

What pins do I use to make the physical connection between the module and the 52833DK ?

If I change the ping using this overlay, to connect . The RX pin appears duplicated.

How I have to change the ping control configuration in the example, to receved the message that sent the module RDM6300 ?

I have to use other uart like uart1 ?

Thank you very much in advance 

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