Originally Posted by operator
Yeah that's the "correct" way (no such thing). The major drawback to that technique is that your bike appears to be very poorly locked to the naked eye (i.e anyone who's not aware of this method).
I disagree.
Most bike thieves are looking for easy to steal bikes. The fact that there's even a lock on the bike will probably be enough to deter most would-be thieves.
More experienced thieves will probably know that they'll need to break both locks and (hopefully) won't be carrying the tools to do both and move on to the next bike instead.
I could be wrong, though. It just seems the presence of any locks will deter your run of the mill opportunist bike thief (and there are plenty of opportunities for them to take) and your more experienced bike thief probably won't bother unless your bike is worth the effort.