Passing structure, defined in external .h, into C++ function, called from matlab function block in simulink

I have the following C++ function, generated by matlab coder:

void Q2X_short(float Q1, float Q2, float Q3, const struct0_T *Description_Leg,
             const struct1_T *Misc_Constants, float *X, float *Y, float *Z)
{    
  LZ = Q2+ Description_Leg->OA;
  *X = LZ * cosf(Q1);
  *Y = LZ * sinf(Q1);
  *Z = Description_Leg->AC * (Q2+Q3)*Misc_Constants->PI;
}

to call this function from block "matlab function", I have to pass reference for structures struct0_T and struct1_T, defined in another .h file. How can I do that?