Grey box in trunk?

I was going to take a picture and forgot but I'm guessing this one will be so simple that someone who knows what it is can answer me without a picture. In the very front of the trunk down in the spare well, sitting in front of the spare is a grey box. About 8-10 inches wide, 5 inches front to back, and 3 or so inches thick. Has an unusual looking cable connected on one side and sits in a black plastic frame that holds it up off the floor. Right over the drain plug actually. I did a couple of... Grey box in trunk?

I was going to take a picture and forgot but I'm guessing this one will be so simple that someone who knows what it is can answer me without a picture. In the very front of the trunk down in the spare well, sitting in front of the spare is a grey box. About 8-10 inches wide, 5 inches front to back, and 3 or so inches thick. Has an unusual looking cable connected on one side and sits in a black plastic frame that holds it up off the floor. Right over the drain plug actually. I did a couple of...

Grey box in trunk?

---------------------------------------------------------------------------
Visit this link to stop these emails: https://zpr.io/t5iAW