Modem_cellular.c Custom Commands.

[AndrewAWG97]

Hi, I am using bg95 with ZephyrOS. I a have the 2.5.2 toolchain, so it's not updated with all the new feature that I can find here in the last commit, but I am able to add some feature needed like the IMSI for example with it's own callback function and it's working perfectly.
So, what I am trying to do is I want to be able to trigger the script from my application layer. I want to add my custom scripts to the library for example script to use GPS and get location. I already know how to implement the script but I want to know how to trigger or invoke this script.
Thanks in advance.