Question: Secure a bicycle to metal railing.
Options:
Using a cable bike lock, loop cable around vertical post in railing.  Take one end through the front wheel.  Thread the other end through the back wheel.  Lock the cable underneath the two metal tubes in the middle of the bike frame.
Using a cable bike lock, loop cable around vertical post in railing.  Take one end through the front wheel.  Thread the other end through the back wheel.  Lock the cable in between the two metal tubes in the middle of the bike frame.
Answer: Using a cable bike lock, loop cable around vertical post in railing.  Take one end through the front wheel.  Thread the other end through the back wheel.  Lock the cable in between the two metal tubes in the middle of the bike frame.