Geeetech

Hello,
Autoleveling configure:
My coordinate of the probe on the manual control panel is (24, 13,1.5)
My 3D Printer is G2S with 2 hotend.
In Configuration-h I modifiy: X_PROBE_OFFSET_FROM_EXTRUDER -24 and Y -11 and Z -1.5 Is it correct?
Then I compile and I have error below.
More, with values that ...

Hello,
Where can I connect a fan for auto-cooling with Slic 3R on GT2560 for G2S?
Thank's for your help.