How to make an array game_save friendly?

// container variable arrays
var slot_owner[500];									// if slot_owner[index] > 0, the slot is being used by something
var slot_origin[500];								// original slot number in case new slot is full, item will return to origin
var item_id[500];										// id number of the slot item; if 0, no item in slot
var bmp_icon_x[500];									// x location of the upper left pixel of the bmap icon on item sheet
var bmp_icon_y[500];									// y location of the upper left pixel of the bmap icon on item sheet
var bmp_icon_width[500];
var bmp_icon_height[500];
var name_index[500];									// name lookup index
var file_index[500];									// mdl file lookup index
var synergy_id[500];									// item has synergy with item number (item_id)
var synergy_usecode[500];							// item synergy use code, looks up the action to be taken
var equip_manager[500];                      // equip manager is used to determine what slot item belongs in, such as weapons and armor, otherwise preventing action


function save_slot_owner()
{	
  
	slot_owner = sys_malloc(sizeof(slot_owner));
	memset(slot_owner,0,sizeof(slot_owner));	
	add_struct(slot_owner,sizeof(slot_owner));
	return slot_owner;
}

typedef struct {

	var slot_owner[500];							// if slot_owner[index] > 0, the slot is being used by something
	var slot_origin[500];						// original slot number in case new slot is full, item will return to origin
	var item_id[500];								// id number of the slot item; if 0, no item in slot
	var bmp_icon_x[500];							// x location of the upper left pixel of the bmap icon on item sheet
	var bmp_icon_y[500];							// y location of the upper left pixel of the bmap icon on item sheet
	var bmp_icon_width[500];
	var bmp_icon_height[500];
	var name_index[500];							// name lookup index
	var file_index[500];							// mdl file lookup index
	var synergy_id[500];							// item has synergy with item number (item_id)
	var synergy_usecode[500];					// item synergy use code, looks up the action to be taken
	var equip_manager[500];                // equip manager is used to determine what slot item belongs in, such as weapons and armor, otherwise preventing action

} SLOTS;

SLOTS* container;


function save_containers()
{			
	add_struct(container,sizeof(SLOTS));	
}