1973 Scamp how do i disconnect seatbelt buzzer

hello out there...1973 Scamp - slant 6 ..automatic .......all the sudden when I put in gear "with seat belt on the buzzer goes off & stays on "im late for work" smile".......didn't even work at all until last night I pulled dash out a little to try and find dash light &just slipped it back in and now seatbelt buzzers works ..to much.....I just want to disconnect it