need to find my buzzer wire

[sadee5150p]

Hello all, can anyone tell me where the wire is located on a 1990 ford ranger stx for the headlights are on reminder buzzer/dinger? My boyfriend forgets to turn off the headlights and needs the buzzer/dinger to remind him. The people we bought the truck from unhooked it and can't remember where it is. Thanks

 

[wr250rdr]

center of the dash at the bottom. it should be a white box with a plug hanging next to it