Re: chain breaking
Wish I knew how to describe the parts but lets just say that the master link is a male. You want both ends of the chain to have the female parts (the parts without the outer jacket)
In this pic the top would be the male and the bottom would be the female. The way the chain is now, it will go together with just the pin and that is OK but if you wanted to use a master link the outer casing would have to be removed.