Broken wire for little blackbox under bonnet?

[D4NNY-801]

Hi all,
I was doing my rocker cover gasket on my vtr yesturday and noticed a single yellow wire has snapped out of a little black box, top left corner of rocker cover, any idea what this is? Engine still runs ok?

[SAXO8VYO]

it comes from the coilpack its a radio suppressor it stops radio interference from your car i believe. its not important i got rid of mine over a year ago.

[chinkostu]

Just likely to hear noise through the radio now. My saxo arial was shit anyway