How can i connect two LoRa-E5 Dev Boards as concentrator and node?

Dear Team,

I am using LoRa-E5 dev kit . Now i am able to flash the images taking from Wio-E5 STM32WLE5JC Module - Seeed Wiki links.

Now i want to connect 2 LoRa E5 dev boards to connect as both concentrator and node.
Can anyone help to find the suitable codes for flashing the images for both concentrator and node.