Goron mines help plz

[Qual]

Goron mines,I get all the way to the end and get to a room with a big door with chains on , the door looks like a target with a hole in, but i cant figure out what to do, i think i should be figting the level boss Fyrus but cant seem to trigger it,

Any help, cheers

 

[gmi109]

did you get all three key fragments???? if I know what you are talking about, then you need the three key fragments to open the door leading to the boss.

 

[Qual]

yea, im thinking now i didnt get the last part of the key, i think its in the room with teh statues, i shot all the eyes out and went through, but didnt pull them all to get behind them.