where to set the offset code of the MPU in S-function builder ?

i downloaded a ready S-function of MPU 6050 from this link: https://minseg.webs.com/arduino-downloads and i'm using a trial version R2018a. in the s-function, there's a part of libraries part of Update pane

        Wire.begin();
        accelgyro.initialize();

part of output pane

        x_vel[0]=accelgyro.getRotationX();
        y_vel[0]=accelgyro.getRotationY();
        z_vel[0]=accelgyro.getRotationZ();
        x_acc[0]=accelgyro.getAccelerationX();
        y_acc[0]=accelgyro.getAccelerationY();
        z_acc[0]=accelgyro.getAccelerationZ();

i wanted to add setoffset() because my MPU give me wrong values

accelgyro.setXAccelOffset(-917);
accelgyro.setYAccelOffset(-1479);
accelgyro.setZAccelOffset(1380);
accelgyro.setXGyroOffset(-2944);
accelgyro.setYGyroOffset(-18);
accelgyro.setZGyroOffset(-6);

i put it in different panes start, output and update but it still give me wrong values. i didn't know what to do.