I happens automatically. However, it usually takes a day before the coins become spendable. If you have your wallet set to purchase tickets automatically, you may never get to spend the bulk of them unless you adjust your settings.
Nice, thanks! Out of curiosity though, the PoS pool shows me a "Redeem Script". What is that for?
The redeem script is the private key that you need to import into your local wallet. You do need to do this once before you can redeem any of your rewards, so the answer that I gave you previously, does not totally apply. However, once you import in your wallet, it will be automatic from there.