Modbus registers

Hello
I am using an AXC F 2152 PLC and I am configuring the Modbus client blocks and the f23 block for reading and writing to a Schneider Modicon Quantum PLC, the PLCNext reads and writes the registers without problem, however I also want the Quantum PLC to point to it to a Modbus register but I don’t see that the PLCNext has its own Modbus addresses, is it possible to create them or how could I solve this issue? thanks!