yeah there's 2 for the radio in the gaping hole below the HVAC control. This 3 wired one puzzles me though just like the white one. The white one was definitely used at one point and looks pretty important.
Charlie
1977 M880 Cummins 5 speed SOLD 1985 Crew cab Cummins P7100 NV4500 D60/D80 SUNY Maritime Class of 2017!
That white one looks like it is for the buzzer.Not that important if your brain is still working well.
93 W250 LE extra cab, 5 speed,warn winch, tach,piro,boost gauges. Gov.spring and fuel pin... Play truck -91 W350 LE reg cab chassis.exxxxtended 175"wb, banks intercooler,on board air ,5 speed,... Work truck