I said similar in a post to you but it isn't there, my stupid phone sometimes doesn't play the game, damn thing...........................What I said was to look at the bottom of the key barrel if has a flat lug there should be a corresponding slot at the bottom which you can turn with a screwdriver, sometimes it may be a square slot either way it will turn with something to open and the barrell usually has a cam slot along the side which will slide back into the holder but will need a push or pull sort of thing to lock in place, some have pins sticking out which need to be pushed in as the lock is pushed back in then when in the correct position these pins will pop out and lock the thing in place, can be a big pain.........I've had a few locks come out with the key, most annoying, not a great lock anyway as a strong steady bit of force, like wrong key in lock will open them.