More descriptive title added.
It is standard -- as we say in the military, when all else fails, read the instructions -- yes, when installing new hoses and new clamps, both "relax" a bit after initial installation, and the instructions, and most advice, indicate retightening all clamps about a week later, and then check. Of course, we should be accomplishing a pre-ride check every time we go out, which would catch, presumably, fluids where they are no supposed to be.
Good luck.