how to connect xbee s2c to cc2531


I have been working on creating a mesh network using the Xbee S2C modules and I was successful in setting up also hop the data to control End devices by sending the AT commands enclosed in the API frames. This setup was done using the X-CTU tool, but the problem is now I have a CC2531 based gateway where the CC2531 is acting as the coordinator and I am not able to find solutions of how to make the CC2531 recognize the Xbee S2C modules and configure the Mesh network, which is similarly done by coordinator in the X-CTU tool

Are you able to query the COM port that the XBee module is mounted to?