I would suggest that the lines would be tight enough to keep the position of the boat but not so tight you are causing damage to the fittings,
This brings back a memory we were moored up to a string of floating moorings and wanting to leave at high water to find the knot tied to the buoy about 10ft under water, after a lot of winching, (sheet winches fed through the fairlead) we managed to pull the knot up to the sea level and put another rope on it and untie it. We had to do the same on the bow using the anchor winch!!
But that’s to be expected with 40ft rise and fall……..
Try and experiment with having them tighter or looser and see how you get on, I would suggest every situation is different.