What are the two chains for that come with the barbeque?

What are the two chains for that come with the barbeque? main image

Its required by Australian standards that (a) if the barbeque is used without a cart, that the barbeque is chained to the gas cylinder to prevent accidental overstretching of the hose; (b) if the barbeque is connected to a reticulated supply of gas that the barbeque is chained to a strong point near the gas supply outlet to prevent accidental overstretching of the hose. It is also required for the barbeque to have a means of manually lighting should the ignition system fail. The smaller chain has a match holder to help in case of this almost impossible occurrence.