The MC is mounted to the firewall. The combination valve is mounted to the rear inner fender apron. These two objects are on two different planes. The coils allow for some movement of the lines without work hardning of the flared ends, so the don't crack and start leaking. It also makes it easier to connect the fittings into the ports if you have some flexibility.

Unless you really know what you are looking at, the only way to know if they leak is to simply install them and see...

And in Australia, they twist them in the opposite direction....  Someone told me that they put them there so you would have extra brake line if you messed up the fitting or the flare.  Uncoil 1 turn, add a new fitting, and flare it.