Geeetech G2s print cooling
I'm pretty new here but couldn't find anyone with this issue. I have a Geeetech G2S which uses a GT2560 controller which has 4 fan ports. The first is used for the hotend fan, the 2nd is for the extruder, the 3rd is for the main board fan, and the 4th is open or used for a second extruder. I purchased a 40mm fan I want to use as a print cooler which will use that fourth fan plug. I have very little programming experience at the moment although I'm in some classes, but I do not know how to tell repetier to use that pin as the filament cooler. I don't even know where to find what pin that port goes to, sorry I'm new at this. I will give more info as needed, any help is appreciated. Thanks.