Don't worry too much about it, they aren't all that fragile, just don't bend them too much so that you kink the capillary tube. If both are lose you can see from the holes where the tube comes into the cavity which one goes above the other. In mine the longer one goes on top.
A word of advice from Effeuno is that you should never turn them to 0 when you are finished with the baking session, this is as apparently it can cause too much pressure in the tube and break them. I normally turn up both to 500C when I'm finished baking and when everything left on the stone has turned white I press the off button and open the door slightly. The fan will keep running until the oven cools off.