My daughter has Shimano SL TX30 gears on her bike....I think they might be Tourney, from searches I've done. The gears on the right handlebar has a button to go down gears. I stupidly took it off the bike and opened it, with plans of changing the cable. Well couple bits of plastic popped out and I don't know how they go back in to be able to change gears with it. If you use either the lever or the button for changing gears it would make a clicking sound. I'm hoping someone might have a pic of the inside so I know where and how the pieces go back in. Searched the Internet with no luck as yet.
Thanks in advance xox