Need some help getting Firmware to work with EzABL bed leveling and the BTT Smart Filament sensor

I am using the Th3D EzABL bed leveling sensor, but I cannot get it to work with the BTT Smart Filament sensor. I have tried using custom build for this, but I am still having issues. What I really need to know is, what pin is being used by the Filament Sensor on the 4.2.7 Board. I have searched to see if I can find out what the pin numbers are, but I am not having any luck. If anyone can tell me what pin I should define in the Pins file or my board, I would appreciate it.

I am trying to create a modified marlin build, and I am close. I have the ExABL working, but the Filament sensor kicks off with a filament out signal if I turn it on. I think it is because I have the wrong Pin defined.