If you're certain they're hardy fuschias, you can just leave them out. In the spring, the new growth will start fro the bottom again, so just break off the old, woody stems from this year's growth. I would also recommend repotting them next spring into a slightly larger pot (same every year, so's they can grow.).
If they really are hardy they should survive, but it would be helpful if you could move the pots right up against your house wall for some added protection if frosty nights are expected. You could also prune back the stems once they have died off and cover the crown with a little straw or other protective material. Also, make sure your pots are frostproof, otherwise the roots will be damaged or killed.
Mine are in the ground but there are two schools of thought on this. One is to leave the stems as they are during winter, even though they will die off, as they add a little extra protection to the root of the plant. and then prune as appropriate when the new spring shoots start reappearing. The other is to cut them back to ground level if you want them to look neat. If you're unsure, treat half the plants one way and the other 50% the other and see which provides the best result for you.