Allow printing to begin at lower temp (looking for hints)

Firstly, I apologize if it's not appropriate to ask for help here.

I'm working with a printer which has a chamber heater that's recognized by the software as a bed heater (legacy, I wasn't here for that), so I'm trying to get it to begin the print when the "bed" heater reaches 45 or 50, even if the target temp is higher, for the purpose of cutting print time. I'm trying to learn how to work with the code myself, so before I ask how to do it, I'm wondering if someone could just tell me which files I will need to edit, and maybe the names of functions to search for, or directions to certain code blocks, so that I can try to do it myself.

Then, when I fail, I'll come back and ask for help

I'm new to all of this, so sorry if there's some information I need to share but didn't.

This is part of your slicer software

gcodes

M140: Set Bed Temperature (Fast)
M190: Wait for bed temperature to reach target temp

you need to edit the generated gcode file so that the M190 value is set to the lowest temp then is followed by a M140 which will continue to increase the temp but will not stop the print.