Wiring up a laser to Ramps 1.4 with Marlin 2.1.1 on MPCNC

I have a Ramps 1.4 board on a Mega 2560.
I’m not sure what pin is laser on the current firmware hex file.
If I recompile, which ramps pins file do I use to change the laser pin as it appears D44 is fried.
Thanks and happy New Year.
Forbes