which lead/spade connector turns off buzzer light noise??!!

which lead do i need to pull off under the engine to stop buzzer/light sound, the noise is driving me mad!! ive tried pulling off brown connecter near rocker cover (2 wires) and also the spade on top of oil filter, but still buzzes! would it be the lead/spade that connects to the side of the rocker cover? i not sure whether i sure take this off as is coated with oil!! is this a separate issue, any ideas?

any help much appreciated as im getting very frustrated


regards james