something that looks odd in your picture is the terminal ends.
it has to do with the space, or lack thereof, between the ears of the cable ends.
knowing a person only needs to tighten the terminals snugly so they don't rotate, i have found terminals that do not have at least 1/8" gap between the ears have a tendency to not contact the post surface entirely, allowing air space [however minutely] between the terminal and post to possibly create corrosion in the future.
also, the negative post looks to be sitting somewhat proud of the post top. using a set of battery terminal spreading pliers would help the fit of that.
not trying to nit pic, just observing a couple of things that have caused me corrosion issues over the years.