アクセルの開度を計測するケーブルだそうですけど、クルコンを買おうとするまで、自分の車のアクセルが電子制御だとは知りませんでした。
ワイヤーでバルブと繋がってると思ってたよ！

It seemed to be the cable for measuring accelerator divergence, but until I tried buying a cruise controller, I didn't know that my car's accelerator is electronically controlled. I thought it was connected by wires and valves!