It looks like you have the bike up side down in the photo. That can make it more confusing. I was away from bikeing for a lot of years and had the same problem the 1st time back. I went to the local bike shop , the owner showed me one time and I have been ok ever since. I was luckey the shop was classic friendly and Frank Zappa was plaing on the shop stereo( Joes Garage I think). I knew I was in the right place before I even spoke to any one and its still my lbs 3 years later.