[C]Operators, structs and arrays hlp[Complex]

Hi /prog/.
I know /prog/ does not like help threads but this one is a ballbuster(atleast for me).
Anyways, i have a struct that looks like this:

struct hash_entry {
  sdr he_Data, he_Symbol;
};

struct hash_index {
  u32 hi_Hash, hi_NumEntries;
  struct hash_entry **hi_Entries;
};

struct hash_table {
  u32 ht_NumEntries;
  struct hash_index ht_Indeces[];
}; or this if you prefer.
struct hash_table {
  u32 ht_NumEntries;
  struct {
    u32 hi_Hash, hi_NumEntries;
    struct {
      sdr he_Data, he_Symbol;
    } (*hi_Entries)[];
  } ht_Indeces[];
};
Now i dont know how to assign something to the hi_Entries[x]->he_Data or he_Symbol.
I looked up K&R and the Cbook but all i got was this: ((struct hash_entry*)(*FX->ht_Indeces[0].hi_Entries)[0])->he_Symbol = Key; but GCC gives cannot convert to a pointer type

I think you can guess what i want to do looking from the code.