3 Extruder Marlin Configuration

So im building a rather large printer and its going to have 3 hot ends, not going to one, i know you can use the m10 command to setup the extruder offset but i wanted to know how to configure it in the firmware

Quote
marlin firmware
// Offset of the extruders (uncomment if using more than one and relying on firmware to position when changing).
// The offset has to be X=0, Y=0 for the extruder 0 hotend (default extruder).
// For the other hotends it is their distance from the extruder 0 hotend.
// #define EXTRUDER_OFFSET_X {0.0, 20.00} // (in mm) for each extruder, offset of the hotend on the X axis
// #define EXTRUDER_OFFSET_Y {0.0, 5.00} // (in mm) for each extruder, offset of the hotend on the Y axis

There is this piece of code in the configuration.h file but how would you use it to confugure 3 extruders, would you have to define another X and Y offset for each extruder

#define EXTRUDER_OFFSET_X {0.1, 20.00}
#define EXTRUDER_OFFSET_Y {0.1, 5.00}
#define EXTRUDER_OFFSET_X {0.2, 20.00}
#define EXTRUDER_OFFSET_Y {0.2, 5.00}

would it look something like that