The third of two options to connect the potentiometer is not use the potentiometer at all, instead use useless key combinations for instance

hold LEFT+RIGHT pressed at the same time then use UP and DOWN keys to select sensitivity. To make things more interesting use a fibonacci sequence for the sensitivity, I mean the steps will be

1, 2, 3, 5, 8

And the combination UP+DOWN to reset to 1, just in case one get lost in the size of the step.

Now let't get back to the bench and code like there's no tomorrow until the job is done!