u mean like a lock or like the part that attaches to the sproket and rotates the wheels?
if its a lock make sure you get the frame wrapped up a bit and stay away fromt he wheels becuase there easy to take off.
ve no clueif its the other option put it on the back part and the top of it on the...
neither of them are important. I have no idea what twitter is but im assuming its similar to facebook and myspace making it worthless and history is just some boring stuff that happened in the past and unless your a history major its not that helpful in real life so therefor pointless.