Snooping the serial port of EVO192 + PCS250-P2C

[nkrepo]

Hi all and thanks for the great project!
I have an an EVO192 with firmware below 7.50.000 that has the only serial port available occupied by the GSM module PCS250-P2C. I wish to snoop on the serial port with an appropriate serial port snooper and passively listen and decode the serial port and push them to home assistant. Is that setup possible ?

*There any other way to get access to the serial serial port ? The PCS250-P2C has secondary serial port but I am not sure how it can be used...