bought this new in 2017
today put turn signals on her had a heck of a time finding the front turn signal wire for them it is behind the battery under the hood hiding(came with turn signal switch installed )  but while doing that i found i have a low sensor wire for my break cylinder laying there never plugged in where does it go ?

need help
bought unit new just installed turn signals
but found the wire for low brake fluid cylinder not hooked up where does it plug in at