part no look up please ?

hi
pn 3746849 what is it ? what does it do ?

sf3224749 0594 also printed on box

it is behind the dash of my 74 dart, some sort of electrical box with resistors and diode ect inside ?

board inside box pn 3596871

thank you!!

There is a thread here.
Seat belt buzzer or switch for starting with seat belts enagged

https://board.moparts.org/ubbthreads/showflat.php?Cat=0&Number=4367173&an=0&page=0