How to represent struct pointer in Simulink ???

Following is example about header and source file which used structure pointer . I used the bus for structure type, but I don't know represent in func function.

Can you show me the way ???

Header file (.h)

typedef struct newStructType{
	uint16_t	    a;
	void*	        pVal;
	subStructType *	ptr;
	uint8_t 	    type;
}newStructType;

typedef struct subStructType{
	unsigned char	a1  : 1;
	unsigned char	b1  : 1;
}subStructType;

Source file (.c)

newStructType* const PtrTable[];

uint32_t func(uint16_t var)
{
	newStructType* temp = NULL;
	if(var > 100)
	{
		temp = (newStructType*)PtrTable[var-100];
	}
	
	switch(temp->type)
	{
		case 1:
			Ret = (uint32_t)(*(uint8_t*)(temp->pVal));
			break;
		case 2:
			Ret = (uint32_t)(*(uint16_t*)(temp->pVal));
			break;
		default:
			break;
	}
	
	return Ret;
}