how to fix printing in the center of bed.

I made this simple mark to measure the offset of my nuzzle from the bed center after that need to update the marlin firmware with X_MIN_POS and Y_MIN_POS ( to move the nuzzle toward the x limit sensor need to add the diffrent between the center of the bed to the center of my mark pattern :

// Travel limits after homing (units are in mm)
#define X_MAX_POS 220
#define X_MIN_POS -30
#define Y_MAX_POS 220
#define Y_MIN_POS -8
#define Z_MAX_POS 240
#define Z_MIN_POS