This photo is similar to yours. On the right lower area there is a connector with one bolt. To the left of this connector, there are two bolts next to each other, one with red or pink ink on the bolt. Could this be the location? It's difficult to see in your pic, if a plug is on the connector. Also, note how close the oil filter hosing is in the photo. You loose wire is very close to the oil filter. When you are under the car, you cannot see the connector on the oil filter housing.