HELP Wire Leading To Bonnet?!?!

TurboReece

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Howdydoody, newbie here.
I recently replaced my bonnet/hood and had to cut the wiper fluid pipe and a wire on the driver's side (RHD) that led underneath the ECU's protective box. Does anyone have a clue what this wire is for/does?? Inside the protective layer there are 4 wires.

I will upload a picture when I finish work if that helps anyone.

Reece