These tiny 'tic tac" sized pieces of metal (with threads on either end and a hole in the middle) will allow you to join 2 cables together to make a longer one. It is recommended to use the T-shaped key whenever connecting more than one cable together.
[S] coded connectors fit onto all [S] coded cables. [L] coded connectors fit onto all [L] coded cables. MINI connectors only work with the MINI cables and tips.