Personally, and opinions will vary I'm sure. I would introduce them to each other whilst holding one of them, and if they seem ok with that put them in together and observe for a couple of hours.
If Harley is putting out the right pheromones I'd expect action in minutes. If not leave them together for as long as it takes, in fact I'd leave them together until you start seeing signs that she is gravid.
At the end of the day a male will only court a female that smells right, if the female smells right she'll be receptive, if she doesn't want to mate she won't be producing pheromones to attract the male.

This iis based on reading and my limited experience, so I'll wait to be corrected on any of the details by the more experienced breeders. :-)